21.co, the parent company of 21Shares, has integrated Chainlink Proof of Reserve on Solana and Ethereum to enhance the transparency of its Wrapped Bitcoin (21BTC) by enabling real-time verification of Bitcoin reserves. The integration ensures 21BTC is fully backed 1:1 by Bitcoin held in cold storage, providing secure minting and greater transparency. This move strengthens cross-chain compatibility and liquidity, while Chainlink’s decentralized infrastructure offers real-time monitoring and cryptographic guarantees, preventing malicious minting and increasing trust in 21BTC across both ecosystems. Earlier this year, 21Shares integrated Chainlink Proof of Reserve on to improve the transparency of the Ethereum reserves backing the 21Shares Core Ethereum ETF (CETH). Source: Globe Newswire & CryptoPotato