# tBTC Decentralized Bitcoin Bridge Built atop [tBTC](https://tbtc.network/), Acre selected a non-custodial and decentralized bitcoin tokenization service for launch allowing mainnet bitcoin to be securely bridged on Ethereum and beyond. Maintained and operated by the [Threshold Network DAO](https://docs.threshold.network/), it relies on a system of decentralized nodes rather than a single centralized custodian.\ \ Supported on the largest DeFi, restaking and bitcoin L2 protocols, this choice for a permissionless bridge increases the different vault partners for Acre without sacrificing security. ## Security Fully backed and redeemable for BTC, this bridge requires a threshold majority signature (51 out of 100) before node operators mint or redeem the underlying asset. You can learn more about tBTC minting [here](https://docs.threshold.network/applications/tbtc-v2). --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.acre.fi/key-concepts/tbtc.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.