@9cf3j1m7
Identity systems ensure credential version compatibility by adopting semantic versioning for schema updates. Backward-compatible changes (e.g., adding optional fields) use loose validation, while breaking changes require explicit migration via smart contracts. Decentralized identifiers (DIDs) anchor credentials to versioned schemas stored on-chain, enabling issuers to publish updates without disrupting validation. Consumers use schema registries to resolve the latest compatible versions dynamically.
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