BackToBitcoin (B2B) is an innovative and compliant framework that enables enthusiasts of decentralized finance (DeFi) to participate in Bitcoin (BTC) exposure while also benefiting from direct on-chain yields. Our objective is to combine the value and liquidity of Bitcoin, the transparency of smart contracts, and the reliability of proof-of-reserve. We are developing a specialized middleware for Bitcoin within the Ethereum Virtual Machine (EVM) mesh system. Additionally, B2B offers multiple avenues for Bitcoin holders to generate DeFi yield. There are two primary sources of Bitcoin yield within our platform. The first source is through ad-hoc staking, where holders of $B2B can earn yield. The second source is through $B2B rewards and distribution. Additionally, B2B is developing a DeFi-focused platform specifically for Bitcoin, which will introduce various derivative protocols that will benefit our users. B2B is driven by the ambition to establish a connection between Bitcoin's decentralized finance (DeFi) ecosystem and various networks.