Kraken has launched kBTC, a cross-network ERC-20 token backed 1:1 by Bitcoin for DeFi use on Ethereum and OP.kBTC enables Bitcoin to be compatible with Ethereum and Optimism networks, expanding its use in decentralized finance (DeFi) applications.The token is fully backed by 100 BTC, split 80% to Ethereum and 20% to OP Mainnet, ensuring transparency and secure custody.Kraken plans to progressively add kBTC to more blockchain systems, increasing its compatibility and utility in the DeFi ecosystem.