Block Inc. publishes first proof-of-reserves report disclosing $2.2B in total bitcoin holdings as of March 2026

Block published its first proof-of-reserves report disclosing total bitcoin holdings of 28,355 BTC worth approximately $2.2B as of the end of March 2026, confirmed by third-party auditors. Of the total, 19,357 BTC worth roughly $1.5B were held on behalf of customers through Cash App and Square, while corporate treasury holdings totaled 8,997 BTC worth approximately $692M. Block said it adopted the proof-of-reserves approach so that users “shouldn't have to trust that their bitcoin is there, they should be able to verify it,” using on-chain signatures that allow anyone to independently confirm the company's holdings.