Stacks serves as a Bitcoin Layer for smart contracts, empowering smart contracts and decentralized applications to utilize Bitcoin as an asset and execute transactions on the Bitcoin blockchain. Bitcoin stands as the largest, most valuable, and most enduring decentralized asset. Through the Stacks layer, approximately $500 billion in BTC capital is unlocked, utilizing the Bitcoin Layer 1 for decentralized application settlement. Utilizing Proof of Transfer consensus and the Clarity language, Stacks possesses comprehensive knowledge of the entire Bitcoin state, allowing it to access Bitcoin data at any given moment. All transactions conducted on the Stacks layer undergo automatic hashing and settlement on the Bitcoin Layer 1. Furthermore, Stacks blocks are fortified by 100% Bitcoin hashpower. Any attempt to reorder Stacks blocks or transactions would necessitate a reorganization of the Bitcoin blockchain.