Wrapped Bitcoin (WBTC) is a tokenized representation of Bitcoin designed to operate within smart-contract ecosystems, particularly on Ethereum and other supported blockchains. Each WBTC token is intended to represent one Bitcoin held in custody, creating a 1:1 peg with the underlying asset. The primary implementation is an ERC-20 token on Ethereum using the contract address 0x2260fac5e5542a773aa44fbcfedf7c193bc2c599.