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Ontology's Decentralized Identity Architecture
Ontology, a blockchain platform, has been running a decentralized identity system on a public chain since 2018. By the end of 2026, every EU member state must provide a digital identity wallet to its citizens. The system allows users to hold their credentials and share only what services need, with services verifying claims without contacting the issuer. The article explains the roles of issuer, holder, and verifier, and how Ontology's public chain acts as a registry for identifiers, keys, and credential statuses.