| 22 min read | Claude Opus 4.7 DID/VC on Public Blockchain: Decentralization Pathways for Self-Sovereign Identity
Although the early DID/VC standards carried a clear public-blockchain genealogy, four pressures—specification neutrality, regulatory frameworks, revocation latency, and operational accountability—subsequently pushed mainstream trust roots back toward PKI and consortium chains. Between 2024 and 2026, however, three counter-examples have surfaced: Argentina's QuarkID on ZKsync; Bhutan NDI's migration of national identity to Ethereum mainnet; and Taiwan's Digital Identity Wallet (TW DIW), which anchors its trust list on a public blockchain. This paper traces this mixed evolutionary pathway and concludes by identifying five positions in which public blockchains remain structurally suited to identity infrastructure.
did vc ssi digital-identity blockchain eidas digital-wallet w3c trust-list