Mr. Isaac Maresky reports

GOLD HART COPPER ANNOUNCES CLOSING OF OVERSUBSCRIBED $18,613,613.72 FINANCING

Gold Hart Copper Corp. has closed its non-brokered private placement of 71,590,822 units of the company at a price of 26 cents per unit for aggregate gross proceeds of $18,613,613.72. As disclosed in its March 5, 2026, news release, the company has issued solely units with proceeds immediately available to Gold Hart Copper and not subscription receipts contingent upon the proposed acquisition (as defined herein).

The company intends to use the proceeds from the financing to advance its mineral resource programs in Chile, including accelerated drilling, trenching, geochem and geophysics at its Tolita, Toro, Cachitos, Casale Sur and Zelma concessions in the Vicuna district, and the Nessa complex of assets (Nessa, Ringo, Manto Carolina, and Rebecca properties) along the Domeyko fault system; and for working capital and general corporate purposes. Additional details regarding the financing may be found below and in the company's prior press releases dated Feb. 17, 2026, and March 5, 2026.

Robert Cudney, chief executive officer of Northfield Capital, a significant investor in Gold Hart Copper, commented: "The overwhelming response to this financing speaks for itself. Northfield invested in Gold Hart Copper because its quality assets and geological team are first rate, and the Vicuna district and Domeyko fault system are rapidly emerging as two of the most important copper and gold belts on the planet. We look forward to the drilling."

Isaac B. Maresky, chief executive officer of Gold Hart Copper, commented: "For years we focused on rolling up prime historic assets in the renowned Vicuna and Domeyko gold and copper belts of Chile. Even though we struck disciplined partnership-based deals with land owners, limited budgets generally forced us to focus the lion's share of exploration and development singularly on our flagship asset -- the Tolita gold-copper-moly-silver porphyry target in the Vicuna. Finally, we can accelerate exploration with dedicated budgets for all of our top properties and develop multiple high-potential assets simultaneously."

Gold Hart Copper's Tolita -- flagship gold-copper-molybdenum-silver porphyry target in Vicuna district

On Feb. 23, 2026, Gold Hart announced completion of the drill hole DDHTOL01, which reached a depth of approximately 1,053 metres. 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 geologists observed multiple generations of veinlets and stockworks with varying intensities over intervals up to several hundred metres, banded veinlets with thicknesses of several centimetres, and locally chalcopyrite and bornite mineralization has been recognized in several of these veinlets. Gold Hart geologists do not believe the drill intercepted the same fault which caused a sterile zone in the middle of the initial two diamond holes.

In terms of next steps for the company's flagship Tolita gold-copper-molybdenum-silver asset in the Vicuna district of Chile, Gold Hart has already launched the next diamond drill hole -- DDHTOL04 -- which has now exceeded 500 m. Gold Hart will provide an update upon completion of this diamond drill hole.

In addition the continuing diamond drill campaign, Gold Hart anticipates launch of RC (reverse circulation) drilling at its high-grade trench -- with up to 52 grams per tonne gold equivalent including 3.99 per cent 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 recently hosted a site visit which included tours of the Tolita and Nessa assets. Gold Hart board and advisory board members including the honourable John R. Baird, Mark Kucher and Aleta Shiff were also in attendance.

Nessa copper-gold-silver complex -- Domeyko fault system -- high-grade copper up to 4.7 per cent on surface

Gold Hart recently announced that its geochemical survey at the Nessa complex just west of Kinross's La Coipa gold mine returned high-grade gold, copper and silver results. In total, 12 samples returned gold values in excess of one gram per tonne (samples of one to five kilograms ranging from 1.11 g/t to 9.74 g/t), while 13 samples returned copper values in excess of 0.3 per cent (samples of 0.6 to 4.2 kg ranging from 0.379 per cent to 4.725 per cent)

In addition to high grades on surface, the Nessa complex was historically home to 13 artisanal gold and copper mining pits, where it is reported that high-grade minerals were mined using mules. Gold Hart has been planning a more comprehensive geochemical survey at the Nessa complex, with a target of 500 to 1,000 geochemical samples gridding the property. Gold Hart will provide an update once this exploration campaign commences. 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.

Additional RC drill rig at Tolita to target high-grade trench up to 52 g/t gold equivalent with 3.99 per cent copper

In addition to Gold Hart's primary diamond drilling at Tolita, the company is planning to add a reverse circulation (RC) drill rig in order to target certain higher-grade opportunities closer to surface at Tolita. Specifically, Gold Hart intends to target its highest grade trench, which grades 8.61 g/t gold equivalent over 10 m, including eight m at 10.41 g/t gold equivalent and including two m at 10.40 g/t gold, 20 g/t silver and 2.88 per cent copper, and including grabs of 45.75 g/t gold, 28 g/t silver and 3.99 per cent copper (approximately 52 g/t gold equivalent).

Gold Hart recently opened up this high-grade trench with a bulldozer and exposed visible green and turquoise staining typical of copper minerals malachite and chrysocolla. Interestingly, the larger geophysical anomaly at Tolita appears to reach surface at or near this high-grade trench.

Gold Hart vice-president Rodrigo Diaz Tilleria (PGeo) commented: "Our focus remains the large-scale porphyry potential of Tolita. But Tolita also offers the rare opportunity to target and hopefully prove a high-grade shallower component of the asset. In the Vicuna district where one g/t gold on surface is rare, we have 52 g/t gold and simply put we need to test it. RC drilling is significantly faster and cheaper, does not require water to operate, and is well suited to the characteristics of this target. Our current geological model assumes that this high-grade trench at Tolita may only be a fraction of the size of the larger system, but we do believe it hosts potential for generating higher grade intercepts close to surface and therefore potential to add high-grade ounces, thereby demonstrating another facet to the Tolita asset." Gold Hart originally anticipated launching its RC drill campaign at this high-grade trench in early March, but the drill rig put forth by contractors did not meet the company's requirements. The company has located an alternative drill rig and will update as soon as this campaign commences in the very near future.

About Gold Hart Copper's Nessa 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 per cent (3.3 times) from an initial property size of 4,100 hectares up to a current land position of 13,500 Ha (135 square kilometres). 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's La Coipa gold mine.

The Nessa properties were known to host 13 historic artisanal high-grade gold and 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 25 g/t gold, 3.25 per cent copper, 958 g/t silver. However, the company has now discovered additional copper showings on surface and historic mining pits, and now believes there may be other unknown targets on these assets. Gold Hart recently completed a follow-on geochemical survey and obtained additional high-grade samples, including up to 9.7 g/t gold, 968 g/t silver and 4.7 per cent copper on surface.

Tolita -- flagship gold-copper-molybdenum-silver porphyry target in Vicuna district -- diamond drilling program

Gold Hart geologists -- including senior geologists Prof. Dr. Jose Frutos, Enrique Viteri, Jonathan Warner and Rodrigo Diaz Tilleria -- 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 No. 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 600 m each and encountered approximately 360 m and 230 m of gold, copper and moly porphyry mineralization, respectively. Most recently, Gold Hart returned to target No. 1 DDHTOL01 with a more powerful drill rig and completed a 1.053-kilometre drill hole. Gold Hart is now in the process of drilling DDHTOL04, which has recently exceeded a depth of 500 m.

Consequently, there await at least another six to 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 2.5 square km geophysical anomaly recently expanded by 76 per cent to 4.3 square km to 4.8 square km. The Tolita gold soil sample geochemical surface halo (an approximation of gold on surface above 0.1 g/t) alone is nearly 28 Ha and the Tolita property is 3,476 Ha equal to approximately 34.8 square km.

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 Vicuna 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 per cent copper equivalent, beginning at 1,558 m and ending at a depth of 1,722 m. In the Vicuna 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 53.5 m (1,219.5 m to 1,273.0 m) grading 7.79 per cent copper equivalent.

About Gold Hart Copper's Tolita gold-copper-molybdenum-silver target

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-Vicuna district -- for its uniquely high grades of gold and copper on surface. Geochemical surveys revealed gold, copper, silver and molybdenum anomalies, which led to trenching. Tolita has had significant trenching (5,600 m/5.6 km) with the highest-grade trench returning grades up to 52 g/t gold equivalent including 4 per cent copper. Tolita has undergone helicopter mag surveys which identified four unique anomalies as well.

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

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 2.5 square km in size and "interpreted as a copper-gold or gold-copper porphyry system that certainly warrants additional exploration and drilling." Gold Hart Copper has therefore launched diamond drilling and is fully financed for this planned campaign.

Most recently (April to May, 2025), the company completed two holes of approximately 600 m 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 multigeneration stockwork vein system hosted by a series of multiphase 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 indicate 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.

Additional details regarding the financing

The company does not intend to use any of the proceeds from the financing on its proposed all-stock acquisition of Rhyolite Resources Ltd. (RYE), nor on the advancement of RYE's mineral resource assets in the event that the proposed acquisition is completed. The proposed acquisition is expected to close in late Q2 2026, subject to the satisfaction of certain conditions, including: (i) negotiation and execution of definitive agreements; (ii) RYE shareholder approval; (iii) receipt of applicable court and regulatory approvals, including the approval of the TSX Venture Exchange; and (iv) RYE meeting minimum working capital requirements. In connection with the financing, the company paid participating investment dealers aggregate cash finders' fees of $741,055, and granted an aggregate of 2,859,013 non-transferable finder warrants. Each finder warrant entitles the holder thereof to purchase one share at an exercise price of 26 cents until March 12, 2028. Certain directors and advisers of the company subscribed for an aggregate of approximately 3 per cent of the units sold in the financing. Their participation in the financing is considered to be a related party transaction for purposes of Multilateral Instrument 61-101 -- Protection of Minority Security Holders in Special Transactions. The company is relying on exemptions from the formal valuation and minority shareholder approval requirements available under MI 61-101, as the fair market value of the transaction, insofar as it involves insiders, is less than 25 per cent of the company's market capitalization. The securities issued in the financing are subject to a hold period expiring on July 12, 2026, in accordance with applicable securities laws. The financing remains subject to the completion of customary postclose filings with the TSX-V. Additional details regarding the financing may be found in the company's prior press releases dated Feb. 17, 2026, and March 5, 2026.

About Gold Hart Copper Corp.

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

Gold Hart Copper 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 per cent and not subject to any royalties whatsoever.

Gold Hart Copper believes it may be sitting on one of the only fully preserved untested large-scale gold-copper-silver porphyry targets in the Vicuna 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-Vicuna district's pioneering geologists in 1993. Gold Hart Copper is fully financed for its planned drill campaign.

Gold Hart Copper'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. Prof. Jose Frutos. Specifically, senior Gold Hart geologists were personally involved in the Escondida copper discovery, now the largest copper mine in the world controlled by Rio Tinto and BHP, as well as Norte Abierto/Cerro Casale, the largest gold-copper discovery in Chile acquired by Barrick and Newmont (GoldCorp) with reserves and resources of 50.6 million ounces of gold (0.53 g/t), 13.4 billion pounds of copper (0.20 per cent) and 218 million ounces of silver (2.3 g/t).

In addition to its large land position in the Vicuna 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 six km. Kinross's La Coipa gold mine sits just east of Nessa, as does the Rio2 Fenix gold mine.

Qualified person

The technical information contained in this news release related has been reviewed and approved by Jonathan A. Warner, executive vice-president of Gold Hart Copper and a qualified person within the meaning of National Instrument 43-101.

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