Gold Hart Copper identifies high-grade Au-Cu-Ag at Nessa

New Drill Results from Tolita Asset in Vicuna District Pending; Continues to Advance Application ("Pedimento") For Copioso - Historic Gold Copper Silver Asset & Former Mine to Expand Portfolio of Prime Properties In Chile;

Toronto, Ontario--(Newsfile Corp. - August 24, 2026) - Gold Hart Copper Corp. (TSXV: HART) (" Gold Hart " or " HART ") is pleased to announce the results from the first-ever comprehensive geochemical soil survey at the Nessa Complex gold-copper-silver properties in the Domeyko Fault System of Chile.

The Company is pleased to report that the survey successfully identified multiple zones of anomalous gold, copper, and silver, as well as associated pathfinder elements. The Gold Hart technical team is now integrating all these anomalies together with other geological observations in order to build a comprehensive interpretation. The element associations observed to date are compatible with polymetallic epithermal-style mineralization.

Interestingly, while several of the zones containing elevated gold, copper, and silver did indeed occur in proximity to the known historic mining pits — as expected — the survey also identified other new areas of elevated gold, copper, and silver which now warrant further attention. These results form part of the broader exploration program underway at the Nessa complex, and will be followed-up with additional exploration and development, including detailed geological and structural mapping, trenching surveys and geophysics prior to advancing into the critical drilling stage.

Gold Hart Copper Vice President Rodrigo Alejandro commented, "I was very excited to see several exceptionally high-grade samples from this first geochemical soil survey at Nessa, with individual samples returning up to 3,235 ppm copper, 401 ppb gold, and 36 ppm silver. In fact, on some occasions I remarked that these sorts of grades would be more commonly found in a rock-geochemical survey than a soil-geochemical survey like this one. But perhaps more interestingly, the soil geochemical anomaly appears to coincide very nicely with the known magnetic anomaly, once again pointing to Nessa as offering some highly compelling targets for exploration and advancement."

For further clarity, this geochemical survey was conducted on a prioritized zone of approximately 10% of the greater Nessa complex. Specifically, this first-ever geochemical soil survey at Nessa, covered approximately 1,400 (14km 2 ) hectares of the greater Nessa complex which totals 13,500 hectares (135km 2 ). In total 780 samples were analyzed by ICP. This soil geochemical survey followed upon the success of the prior announced preliminary geochemical rock survey, wherein several samples returned high grades of gold and copper. Specifically, 7 samples graded 1.25% to 4.73% copper, including 4 samples exceeding 2.40% copper. 12 Samples graded above 1g/t gold, with 6 samples grading between 4.10g/t to 9.74g/t gold. Please refer to notes below for details on quality assurance controls.

Gold Hart wishes to thank its dedicated team of 9 geologists and assistants who led this geochemical survey at Nessa, for their excellent work. Specifically, the survey was led by Gold Hart VP Rodrigo Diax, together with Sebastian Galaz, Nicolas Ascui, Benjamin Gomez, Cristian Gonzalez, Pedro Parga, Felipe Valdivieso, Pablo Schulze, and Alejandro Perea.

Results Pending for 7 RC Drill Holes at Tolita in Vicuna District - Targeting High Grade Trench

As previously announced, in addition to Gold Hart's primary diamond drilling at its Tolita project, the Company added a reverse circulation (" RC ") drill rig in order to target certain higher grade opportunities closer to surface at Tolita. Specifically, Gold Hart is targeting its highest grade trench, which grades 8.61g/t gold equivalent over 10m, including 8m at 10.41g/t gold equivalent, including 2m of 10.41g/t gold, 20g/t silver, and 2.88% copper, and including grabs of up to 45.75g/t gold, 28g/t silver, and 3.99% copper (approximately 52g/t gold equivalent). The Company eagerly awaits the results and will report on them as soon as they become available.

Gold Hart Continues to Advance Gold Copper Silver Application ("Pedimento") for Copioso Asset - Historic Mine - to Expand Its Portfolio of Properties In Chile

Per the Company's prior announcement, Gold Hart reported that the Company filed an application ("pedimento") for a gold-copper-silver exploration mining concession (the " Application ") referred to as the Copioso Asset , to expand its portfolio of prime properties in Chile. By way of update, the Company has meaningfully advanced the process, and has now fully confirmed preference on certain portions of the property. The Company hopes to be in a position to provide a more fulsome update by the end of August or early in September. Copioso was a historic mine for gold, copper and silver, and the Company has already begun planning various scenarios for exploration and development should the acquisition be completed successfully. Please refer to the Company's prior announcement (May 20, 2026) for more information: https://www.newsfilecorp.com/release/298175/Gold-Hart-Copper-Provides-Updates-on-Drilling-at-Flagship-Tolita-Asset-in-Vicua-District-Geochemical-Survey-at-Nessa-Properties-in-Domeyko-Fault-System-and-New-Property-Application-for-Historic-Gold-Copper-Silver-Asset-Former-Mine .

Gold Hart Copper - Nessa - 135km Land Package - 1

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Gold Hart Copper - Nessa - Gold Copper Silver Anomalies - 2

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Gold Hart Copper - Nessa - Regional Mag Anomaly - 3

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Gold Hart Copper - Nessa - Elevated Grades Analysis - 4

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Gold Hart Copper - Nessa - Geochem on Mag Anomalies - 5

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Gold Hart Copper - Nessa - Team of Geologists - 6

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Stock Options

The Company also announces its plans to issue incentive stock options to various key personnel. Per its 10% rolling stock option plan, and due to the fact that this plan is currently only ~20% utilized, Gold Hart is issuing up to 13-Million options, which brings the total options to just under 7.5% of the shares outstanding. These options are being allocated to incentivize key board members, executives, consultants, and advisors, including those new team members who have not yet received any incentive stock options. These stock options shall be exercisable for 5 years at a price of $0.26 and remain subject to requisite approvals.

About Gold Hart Copper

Gold Hart Copper is one of the largest independent land owners surrounding major miners where the famous Maricunga Gold Belt meets the emerging Vicuña Copper Belt in Chile. HART is actively acquiring, exploring and developing its portfolio of gold, copper & silver properties adjacent to the largest gold and copper assets on the continent 2 .

HART has rolled-up a portfolio of historically significant assets surrounding majors, in some cases personally staked by the very same geologists who made the adjacent mega-discoveries, since the early 1990s. Some of the Gold Hart properties have already undergone a first phase of drilling, with highly encouraging results of gold, copper, silver, and molybdenum. Gold Hart properties are controlled 100% and not subject to any royalties whatsoever.

HART believes it may be sitting on one of the only fully-preserved untested large-scale gold-copper-silver porphyry targets in the Vicuña District - an asset that was first recognized for its uniquely high grades of gold and copper on surface - and staked by one of the Maricunga-Vicuña district's pioneering geologists 3 in 1993. Gold Hart Copper is fully funded for its planned drill campaign.

HART's team of geologists were personally involved in pioneering exploration in the region, leading to some of its greatest gold, copper, and silver deposits, and include the country's former Geological Survey National Deputy Manager Dr. Professor José Frutos. Specifically, senior Gold Hart geologists were personally involved in the Escondida copper discovery, now the largest copper mine in the world 5 controlled by Rio Tinto and BHP, as well as Norte Abierto / Cerro Casale, the largest gold-copper discovery in Chile 2 acquired by Barrick and Newmont (GoldCorp) with reserves and resources of 50.6-million ounces of gold (0.53g/t), 13.4-billion pounds of copper (0.20%) and 218-million ounces of silver (2.3g/t).

In addition to its large land position in the Vicuña District, Gold Hart recently acquired the Nessa properties just northwest on Chile's Paleocene-Eocene Belt on the famous Domeyko Fault System, which is home to some of Chile's largest gold, copper, and silver assets including Escondida, Chuquicamata and Collahuasi. The Nessa properties host several historic gold and copper artisanal mines with high grades of gold, copper, and silver on surface, with a large alteration and magnetic anomaly extending approximately 6km. Kinross' La Coipa Gold Mine sits just east of Nessa.

Gold Hart Copper - Nessa - 7

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Gold Hart Copper - Nessa - High Grades Copper Gold Surface - 8

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Gold Hart Copper- Nessa - Historic Mining Pits - 9

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Gold Hart - Tolita High Grade Gold Copper Trench On Large IP Anomaly - 10

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About Tolita - Flagship Gold Copper Moly Silver Porphyry Target in Vicuña District

The Tolita property is a historically significant gold-copper asset which was first recognized and staked in 1993 - by one of the pioneering geologists of the Maricunga-Vicuña district - for its uniquely high grades of gold and copper on surface 3 . Geochemical surveys revealed gold, copper, silver, and molybdenum anomalies, which led to trenching. Tolita has had significant trenching (5,600m / 5.6km) with the highest grade trench returning grades up to 52g/t gold equivalent including 4% copper. Tolita has undergone helicopter mag surveys which identified 4 unique anomalies as well 3 .

In 1996, a third party company optioned the property and drilled 3 short 200m RC holes, without any geophysics, and yet still hit gold and copper in all 3 holes, including long intercepts of gold and copper (150m and 164m, respectively) close to surface in 2 of the 3 holes. At the time, gold was approximately $300/oz and copper traded below $1.00/lb, and large scale sulphide porphyry deposits with both gold and copper were often considered less favorable than smaller scale gold-only oxide deposits. As a result, and due to general market sentiment for junior exploration companies in 1997-1998, Tolita was only drilled to a depth of 200m with 3 short RC holes (out of a planned 8 hole campaign) 3 .

When Gold Hart acquired the property, a full geophysical survey was conducted by a recognized geophysics firm, and a large high-chargeability and conductive anomaly was discovered that is near surface and almost 2.5km 2 in size (recently expanded to 4.5km 2 ) and "interpreted as a copper-gold or gold-copper porphyry system that certainly warrants additional exploration and drilling 4 ". Gold Hart Copper has therefore launched diamond drilling and is fully funded for this planned campaign.

In the spring of 2025, the Company completed two holes of approximately 600m each, confirming that Tolita indeed hosts a fertile porphyry system. Gold Hart geologists observed early stage veining near surface, providing the first clear evidence of a porphyry related system within zones of moderate chargeability. The mineral intercepts occur within a multi-generation stockwork vein system hosted by a series of multi-phase porphyry intrusions. Multiple alteration types have been identified, overprinting the original potassic alteration of the porphyry system. At greater depth, the potassic alteration becomes increasingly dominant, accompanied by more intense and continuous veining across locally moderate to stronger chargeability amplitudes. The newly acquired geophysical data indicates that the system may even extend several hundred meters further at depth. Effectively, the Company, and various visiting geologists have all concluded the presence of a porphyry, and Gold Hart is now focused on exploration to find the richer grades and potential limits of the system.

Gold Hart recently hosted a site visit which included tours of the Tolita & Nessa assets. Gold Hart board and advisory board members including the honourable John R. Baird, Mark Kucher, and Aleta Shiff were also in attendance. In this 360-degree immersive video — which allows you to interactively toggle views — Gold Hart co-founder Jonathan Warner explains the diamond drilling process https://cloud-va.insta360.com/share/va/374Q7q0e1K66213G4421719040 also accessible on YouTube at https://www.youtube.com/shorts/lw3fGWwQH2Q .

About the Tolita Drill Campaign in the Vicuña District of Chile

Gold Hart geologists — including senior geologists Professor Dr. Jose Frutos, Enrique Viteri, Jonathan Warner, and Rodrigo Diaz Tillería — carefully designed a 10-hole drill plan in order to optimally test Tolita as a potential gold-copper-molybdenum-silver porphyry target. As prior announced, Gold Hart first attempted to drill target #1 known as DDHTOL01 in March of 2025, but after difficulties were encountered under tight time constraints, the team instead elected to drill DDHTOL02 and DDHTOL05. These holes were approximately 600m each and encountered approximately 360m and 230m of gold, copper, and moly porphyry mineralization, respectively. Gold Hart returned to target #1 DDHTOL01 with a more powerful drill rig and completed a 1.053km drill hole, which returned approximately 738m of gold and copper mineralization. Interestingly, the core continued to display encouraging characteristics, with multiple intervals showing strong hydrothermal alterations and mineralization consistent with a fertile porphyry-style environment. Gold Hart's geologists observed multiple generations of veinlets and stockworks with varying intensities over intervals up to several hundred meters, banded veinlets with thicknesses of several cm, and locally chalcopyrite and bornite mineralization has been recognized in several of these veinlets. HART's geologists do not believe the drill intercepted the same fault which caused a sterile zone in the middle of the initial 2 diamond holes. More recently, Gold Hart completed a follow-on diamond drill hole — DDHTOL04 — which reached 551m. In addition to the diamond drill campaign, Gold Hart launched a campaign of RC drilling at its high-grade trench — with up to 52g/t gold equivalent including 3.99% copper on surface. The objective of the RC campaign is to demonstrate higher grade pockets close to surface, beyond the larger porphyry target. Gold Hart completed 7 RC holes and hopes to report results as they arrive.

As apart of the Company's initial 10 diamond drill hole campaign, Gold Hart has now completed 4 holes, with results now published for the first three. Interestingly, the Company has intercepted gold and copper mineralization in every drill hole to date. There await at least another six or seven highly attractive diamond drill targets identified across the asset area. These targets are supported by a combination of geophysical characteristics, including chargeability and conductivity, strong geological and structural controls as well as coincident geochemical anomalies.

Tolita is a very large target, with an original 2.5km 2 geophysical anomaly recently expanded by 76% to 4.5km 2 . The Tolita gold soil sample geochemical surface halo (an approximation of gold on surface above 0.1g/t) alone is nearly 28Ha and the Tolita property is 3,476Ha equal to approximately 34.8km 2 .

Furthermore, as recently confirmed in a follow-up geophysical survey, the Tolita geophysical anomaly expands in both size and intensity at depth, which could translate into an enlarging system at depth. Per the third party geophysicist who conducted the survey, "The vertical extent of the steeply dipping conductor that is likely related to a fault is better defined on the two new deep lines (2600N and 452200E). This surprised me, as I had expected resolution similar to the first lines. This would indicate to me, that the probable structure extends very deeply and has a strong contrast in resistivity with the host rock. Because it is conductive, it should act as good conduit for hydrothermal water flow, which should be good news for mineralization. There is confirmation that the alteration system extends to greater depth and may increase in intensity at depth as it is more conductive. Hopefully, the copper and gold grades would increase correspondingly as well."

Porphyry systems in Chile, and in the Vicuña District specifically, can prove larger and richer as they progress deeper. For example, in Chile, Atex Resources announced one of their most significant drill holes ever (ATXD25C) which graded 2.72% copper equivalent, beginning at 1,558m and ending at a depth of 1,722m. In the Vicuña District, NGEX published "DPDH028, the best hole drilled to date as Lunahuasi, which was drilled deeper and to the west of all previous holes", which included multiple highly compelling intercept including the deepest 53.5m (1,219.5m - 1,273.0m) grading 7.79% copper equivalent.

About Gold Hart Copper's Nessa Complex - Gold-Copper-Silver Assets

Gold Hart's Nessa properties sit on the renowned Domeyko Fault of Chile, most famous for hosting the Escondida Copper Mine - now the largest copper mine in the world — which was first staked by Gold Hart co-founder Dr. Jose Frutos in the 1970s. Dr. Frutos recognized and personally staked some of the Nessa claims nearly two decades ago, due to the unique surface alteration - visible from satellite imagery — with high grades on surface and several historic mines which exploited gold, copper and silver at or near surface via pits and shallow tunnels. The historic mines coincide with a pervasive yet intense hydrothermal alteration (silicic-argillic to quartz-sericitic with abundant kaolin in the central part) with a halo of propilitic alteration in the periphery, with disseminated gold-copper-silver mineralization throughout.

Gold Hart recently expanded the Nessa property by 330% (3.3X) from an initial property size of 4,100Ha up to a current land position of 13,500Ha (135km 2 ). The Nessa Complex is just south of the massive Codelco El Salvador - Portrerillos copper mining and smelting complex, one of the oldest copper smelting facilities in the country. Nessa is also surrounded by major miners Newmont, Solaris, JX Nippon, and Anglo American, and sits just northwest of Rio2's Fenix gold deposit and just west of Kinross' La Coipa gold mine.

The Nessa properties were known to host 13 historic artisanal high-grade gold & copper pits, which were mined using mules due to lack of access. Additionally, historic geochemical surveys discovered high grades on surface for gold, copper, and silver, with samples up to 25g/t gold, 3.25% copper, 958g/t silver. However, the Company has discovered additional copper showings on surface and historic mining pits, and now believes there may be other unknown targets on these assets. Gold Hart completed a preliminary geochemical survey and obtained additional high grade samples, including up to 9.7g/t gold, 968g/t silver, and 4.7% copper on surface, and today announced results from the first-ever comprehensive geochemical soil survey with 780 samples collected by HART geologists.

Please refer to the notes regarding quality assurance and quality control measures applied during the execution of the work being reported on, at the end of this disclosure. Please visit the Gold Hart Copper YouTube channel for footage of the road construction and copper oxides at Nessa: https://www.youtube.com/shorts/Ax6fOStX72c .

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Qualified Person

The technical information contained in this news release related has been reviewed and approved by Mr. Jonathan A. Warner, Executive Vice President of Gold Hart Copper and a Qualified Person within the meaning of NI 43-101.

For further information please contact:

Gold Hart Copper Corp. Isaac B. Maresky Chief Executive Officer and Director Email: im@goldhartmining.com

Notes on quality assurance and control regarding geochemical survey published

Hermetic sealed individual bags for every sample (ii) Unique sample ID for tracking (iii) Coordinate location and picture of outcrop (iv) Basic geology notes on control points with samples (v) Consistent sample size between 2-3kg (vi) Certified lab conducting assays. Gold Hart utilized AAA Labs in Chile to conduct the assays, an independent laboratory with no relationship to Gold Hart.

Additional References & Notes:

Current metal prices utilized (Gold $4,716/oz, Silver $80.32/oz, Copper $6.09/lb)

Norte Abierto is considered the largest undeveloped gold asset in Chile as defined by hosting the largest number of total gold ounces. Numbers sourced directly from property owner's website and public filings.

Please refer to the Company's NI 43-101 Technical Report on Sedar for information pertaining to Gold Hart Copper's properties including historical exploration at Tolita, including but not limited to, the history of the asset and its original staking, geochemical surveys, trenching surveys, helicopter magnetic surveys, and historical RC drilling.

Geophysical survey is summarized in the Company's NI 43-101 Technical report available on Sedar. Such geophysical surveys are not definitive, and the results are still at an early stage of interpretation, with no guarantee of a mineral discovery.

Escondida is the largest copper mine globally, as defined by producing the greatest number of copper tonnes per annum. Numbers sourced directly from property owner's website and public filings.

Cautionary Statement on Forward-Looking Information

This news release contains "forward-looking information" within the meaning of applicable Canadian securities legislation based on expectations, estimates and projections as at the date of this news release. Any statement that involves predictions, expectations, interpretations, beliefs, plans projections, objectives, assumptions, future events or performance (often, but not always, using phrases such as "expects", or "does not expect", "is expected", "interpreted", management's view", "anticipates" or "does not anticipate", "plans", "budget", "scheduled", "forecasts", "estimates", "potential", "feasibility", "believes" or "intends" or variations of such words and phrases or stating that certain actions, events or results "may" or "could", "would", "might" or "will" be taken, occur or be achieved) are not statements of historical fact and may be forward-looking information and are intended to identify forward-looking information. Forward-looking information is not a guarantee of future performance and is based upon a number of estimates and assumptions of management, in light of management's experience and perception of trends, current conditions and expected developments, as well as other factors that management believes to be relevant and reasonable in the circumstances, including, without limitation, assumptions about: the ability of exploration results, including drilling, to accurately predict mineralization; errors in geological modelling; insufficient data; equity and debt capital markets; future spot prices of copper and zinc; the timing and results of exploration and drilling programs; the accuracy of mineral resource estimates; production costs; political and regulatory stability; the receipt of governmental and third party approvals; licenses and permits being received on favourable terms; sustained labour stability; stability in financial and capital markets; availability of mining equipment and positive relations with local communities and groups. Forward-looking information involves risks, uncertainties and other factors that could cause actual events, results, performance, prospects and opportunities to differ materially from those expressed or implied by such forward-looking information. Factors that could cause actual results to differ materially from such forward-looking information are set out in the Company's listing statement dated March 14, 2025, a copy of which is available on SEDAR+ ( www.sedarplus.ca ) under the Company's issuer profile. Although the Company believes that the assumptions and factors used in preparing the forward-looking information in this news release are reasonable, undue reliance should not be placed on such information, which only applies as of the date of this news release, and no assurance can be given that such events will occur in the disclosed time frames or at all. The Company disclaims any intention or obligation to update or revise any forward- looking information, whether as a result of new information, future events or otherwise, other than as required by law. Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accept responsibility for the adequacy or accuracy of this news release. No stock exchange, securities commission or other regulatory authority has approved or disapproved the information contained herein.

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August 24, 2026 - 4:36 AM PDT

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