The Bitcoin ecosystem's composability DID protocol, BRC-137, has completed a $2.5 million seed round of financing with participation from BASICS CAPITAL, DFG, GATE.IO, JSQUARE, and others. The funds will be used to accelerate the development and growth of the protocol. BRC-137 aims to build a DID ecosystem by introducing composable prefixes and suffixes to enhance asset liquidity. The protocol also introduces a royalty mechanism to promote the development and innovation of on-chain social models.