21.co’s Bitcoin wrapper to add Chainlink proof of reserve. 21.co, the parent company of cryptocurrency asset manager 21Shares, announced on Sept. 23 that it is adding Chainlink’s proof of reserve to 21BTC to address potential concerns about the Bitcoin wrapper’s backing. https://yakihonne.s3.ap-east-1.amazonaws.com/89f93336152fbe149c10445b7e780339e16f9ed7ceeb1596414c65c2779b7582/files/1727144258954-YAKIHONNES3.webp