tBTC is a decentralized wrapped Bitcoin designed to unlock the value of Bitcoin for various financial activities such as borrowing and lending, stablecoin minting, and liquidity provision. This innovative solution is fully backed 1:1 by main-net Bitcoin, allowing users to leverage their Bitcoin without the need for intermediaries. Traditional methods for bringing Bitcoin to Ethereum often involve sending Bitcoin to a centralized party that issues an Ethereum token, which compromises the principles of decentralization and security. tBTC addresses this challenge by utilizing a decentralized network of operators from the Threshold Network. These operators secure the deposited Bitcoin using threshold cryptography, ensuring that any action with Bitcoin requires a majority agreement among them. The tBTC system rotates the selection of operators weekly to enhance security and prevent collusion. This design minimizes the risk of any group of operators fraudulently accessing the underlying deposits. By relying on an honest-majority assumption, tBTC can effectively assess the risk of wallets being compromised, further bolstered by insurance coverage pools that offer an emergency fallback. The Threshold Network, which combines the capabilities of NuCypher and Keep, is central to tBTC’s operation. It provides a decentralized infrastructure for threshold cryptography services tailored for web3 applications. Governed by a decentralized autonomous organization (DAO), Threshold Network also offers flagship services such as Threshold Access Control (TACo) for secure data sharing and communication, in addition to providing tBTC and thUSD, an overcollateralized decentralized stablecoin. In summary, tBTC stands out as a permissionless bridge between Bitcoin and Ethereum, empowering users with secure and decentralized financial options while preserving the core values of cryptocurrency.