{
  "id": "cbor-tag/40303",
  "family": "cbor-tag",
  "slug": "40303",
  "title": "CBOR tag 40303 — ur:hdkey, Bitcoin BIP-32 HD key",
  "summary": "CBOR tag 40303 (data item: map): ur:hdkey, Bitcoin BIP-32 HD key.",
  "kind": "tag",
  "status": "standard",
  "verification": "verified",
  "tier": "A",
  "source_url": "https://www.iana.org/assignments/cbor-tags/tags.csv",
  "source_version": "IANA registry, Last-Modified: Thu, 02 Apr 2026 23:51:20 GMT",
  "retrieved_date": "2026-05-29",
  "ext_type": "iana-registry-row@1",
  "ext": {
    "value": 40303,
    "reference_rfcs": [],
    "raw_columns": {
      "Tag": "40303",
      "Data Item": "map",
      "Semantics": "ur:hdkey, Bitcoin BIP-32 HD key",
      "Reference": "[https://github.com/BlockchainCommons/Research/blob/master/papers/bcr-2020-006-urtypes.md][Wolf_McNally]",
      "Template": ""
    }
  },
  "updated": "2026-05-29"
}