[Circle to Complete CCTP V1 Shutdown on December 1, Urges Immediate Migration to V2] Circle has announced that the Cross-Chain Transfer Protocol (CCTP) V1 (Legacy) will be gradually deprecated starting October 31, 2026, and fully shut down on December 1. If applications are still routing USDC through CCTP V1 contracts, migration must be initiated immediately. Circle stated that CCTP V2 will become the only recommended pathway, supporting standard and fast transfer modes, programmable features like Hooks, and future integrations with additional public blockchains. Circle has published a migration guide blog, reminding developers to complete contract and routing updates in advance to avoid disruptions in cross-chain USDC transfers.