SymVerse is a multi-blockchain platform ecosystem with 1-second block Finality that operates based on self-sovereign distributed ID. With a Symverse-based ID system, independent blockchain platforms can expand blockchain services as a cooperative ecosystem that interacts with one another. SymVerse predicts that a decentralized identifier (DID), capable of expressing the diverse economic activities and interconnectedness of various economic agents and objects within future social infrastructures, will be essential. In response, it introduced a new blockchain mainnet that operates with its own independent decentralized ID system. The SymVerse mainnet is currently the only blockchain operating based on decentralized ID.