> For the complete documentation index, see [llms.txt](https://polarischain-1.gitbook.io/polarischain/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://polarischain-1.gitbook.io/polarischain/9.-native-compliance-framework-erc-3643/9.2-identity-registry-and-gdpr-compliant-mapping.md).

# 9.2 - Identity Registry & GDPR-Compliant Mapping

The Identity Registry maps wallet addresses to verified identity records through three native transaction types:

* `RegisterIdentity`: Associates an address with an identity ID and ISO-3166 country code. Supports batch registration for institutional onboarding.
* `UpdateIdentity`: Modifies metadata (e.g., jurisdiction change, re-verification timestamp).
* `RemoveIdentity`: Archives identity records upon account closure or compliance termination.

**Privacy-by-Design:** No personally identifiable information (PII) is stored on-chain. Identity records reference off-chain verification data via `BLAKE2b-256` hashes, ensuring full GDPR compatibility and right-to-erasure compliance. On-chain persistence is limited to cryptographic attestations and compliance metadata.


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