Odaily Planet Daily News: ETP issuer 21Shares parent company 21.co announced the integration of Chainlink reserve proof on Solana and Ethereum mainnet to improve the transparency of 21.co's wrapped version of Bitcoin (21BTC). The company is using Chainlink reserve proof in 21.co's digital asset management platform Onyx to automate real-time reserve verification and achieve secure minting of 21BTC.