Copper One Reports High-Grade Copper up to 10.5% Cu and 188 g/t Silver from Majuba Hill Underground Sampling

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(via TheNewswire) Vancouver, BC – July 10, 2026 - TheNewswire – Copper One Resources Corp. ("Copper One" or the "Company") (CSE:CEXY | OTCID:CEXYF | FSE:IW8 |WKN: A42AGR) is pleased to report high copper results from samples collected during the recent underground breccia mapping program within the historic Middle Adit at its flagship Majuba Hill Copper-Silver-Gold Project ("Majuba Hill"), located in Pershing County, Nevada. Click Image To View Full Size   Sample MHR-793 returned high grade values with: 10.5% Cu and 188 ppm (5.5 oz/ton) Ag (See Figure 1 and 2)  The 2026 breccia mapping samples were collected to characterize breccia textures at each of the fifteen (15) locations (See Table 1 and Figure 3). Eight (8) rock samples collected in 2016 with copper ranging from 0.39 to 1.6% Cu also shown MHR-793 and the adjacent sample MHR-794 sampled oxide copper described as azurite within magmatic-hydrothermal, intrusive breccias having coarse-spongy and radiating tourmaline matrix. Click Image To View Full Size Figure 2:Sample MHR-793 with 10.5% Cu in underground workings. Left: 28 inch (0.71 m) hammer handle for scale. Right: Close up of Azurite. "Majuba Hill has entered an exciting new phase with drilling now underway on our initial ExploreTech AI-designed core hole," said David Greenway, President and CEO of Copper One. "Recent underground mapping within the historic Middle Adit has strengthened our geological model by confirming breccia-hosted copper mineralization and its relationship to surface structures. By combining detailed field geology with AI-assisted exploration tools, we continue refining drill targets and improving the precision of our exploration program. These results provide additional confidence in our current drill program as we evaluate the extent and continuity of the mineralized breccia system." Table 1: Underground Samples: Select Elements (See Figure 3 for Location) Middle Adit Breccia Mapping The 2026 Spring surface geological mapping program focused on identifying and delineating outcropping tourmaline breccia bodies interpreted to be associated with high-grade copper mineralization. Underground geological mapping within the historic Middle Adit confirmed the presence of the same breccia styles identified during surface mapping. The program confirmed the known northeast-trending breccia system and identified a previo...

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