Power of Attorney for American Bitcoin Corp.

The filing is a Limited Power of Attorney document executed by Hut 8 Corp., U.S. Data Mining Group, Inc., and American Bitcoin Holdings LLC. The document appoints Victor Semah as the attorney-in-fact for these entities in relation to their ownership of securities in American Bitcoin Corp. The attorney-in-fact is authorized to prepare and submit various SEC forms and schedules, including Forms 3, 4, and 5, and Schedules 13D and 13G. The power of attorney remains in effect until the entities are no longer required to file these forms and schedules, or until revoked in writing. The document was executed on September 10, 2025.