Interlay is a cutting-edge DeFi-focused blockchain protocol designed to bridge Bitcoin with other blockchain ecosystems. Originating from the Substrate framework, it operates on the Polkadot network, ensuring robust security and high interoperability. The core purpose of Interlay is to facilitate seamless Bitcoin transactions across different blockchain networks by leveraging its innovative mechanism of Bitcoin-backed assets. Interlay's flagship product, interBTC, acts as a fully collateralized, 1:1 Bitcoin-backed asset, enabling Bitcoin holders to access DeFi services such as lending, trading, and yield farming on non-Bitcoin networks. This enhances Bitcoin's utility beyond the limitations of its native chain. Interlay maintains decentralisation and security by using cross-chain technology and is designed to function trustlessly, ensuring that users retain full control over their assets without reliance on centralised intermediaries.