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

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.

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 a lso 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.

"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 curren...