Amendment to Business Combination Agreement

Signing Day Sports, Inc. entered into Amendment No. 2 to the Business Combination Agreement with One Blockchain LLC, BlockchAIn Digital Infrastructure, Inc., BCDI Merger Sub I Inc., and BCDI Merger Sub II LLC. This amendment extends the termination date for the business combination agreement from December 31, 2025, to February 17, 2026. If the Registration Statement on Form S-4 is declared effective by the SEC by this new date, the termination date will be further extended to April 30, 2026. The amendment also removes a provision that allowed Signing Day Sports to issue super voting preferred shares at the request of One Blockchain.