Merlin Chain, a Bitcoin-anchored Layer 2 network, has initiated a mainnet upgrade on November 7, 2025, to enhance its Zero-Knowledge (ZK) verification infrastructure. The upgrade, which is expected to take 24–48 hours, aims to improve scalability, security, and network efficiency by advancing ZK verification mechanisms and integrating a Bitcoin-based ZK validation model. During the upgrade, the platform will automatically restore normal operations, allowing users to access historical transfers and account balances through the block explorer. This development marks a significant step in strengthening the network's capabilities and user experience.