According to official sources, Bitcoin Layer 2 network BSquared Network announced the integration of Polygon CDK.

BSquared Network stated that Polygon CDK is an open-source code library for launching ZK-supported L2 chains, with high flexibility, feasibility, compatibility, and user-friendliness. As a Bitcoin Layer-2 solution based on zero-knowledge proof validation commitment and compatible with EVM, BSquared Network will build a reliable and advanced Bitcoin zk-rollup together with Polygon CDK. In the future, developers can choose the "Polygon CDK + B² Hub" combination to launch their own BTC Rollup.