CULTURAL GOVERNMENT unitedcultures.eth
ENFRESARZHNL
United Cultures
UNITED CULTURES
Cultural Government on Public Blockchain
0x28b8...4b0E6
BUY UC COIN
Home › Passport › Technical Specification

Cultural Passport · Technical Specification

The on-chain specification of the Cultural Passport. W3C Verifiable Credentials data model. Multi-sig signature by the Cultural Government.

DATA MODEL

The Cultural Passport follows the W3C Verifiable Credentials Data Model v2.0. Each credential is a JSON-LD document, signed by the Cultural Government's multi-sig key on Ethereum, with status checks via an on-chain revocation registry on Polygon.

EXAMPLE CREDENTIAL (JSON-LD)
{
  "@context": ["https://www.w3.org/ns/credentials/v2"],
  "type": ["VerifiableCredential", "CulturalPassport"],
  "issuer": "did:ens:unitedcultures.eth",
  "issuanceDate": "2026-05-20T15:33:00Z",
  "credentialSubject": {
    "id": "did:pkh:eip155:1:0x...",
    "passportId": "UCP-2026-0001-A92F",
    "culturalEntity": "RC-NL-001",
    "tier": "MEMBER"
  },
  "proof": {
    "type": "EthereumEip712Signature2021",
    "verificationMethod": "did:ens:unitedcultures.eth#multisig",
    "proofValue": "0x..."
  }
}

STANDARDS

W3C VC 2.0
Verifiable Credentials
Data model and serialization for verifiable claims.
DID
Decentralized Identifiers
did:ens, did:pkh for subjects and issuers.
EIP-712
Typed Signing
Ethereum signature format for credentials.
JSON-LD
Linked Data
Self-describing credential payloads.

VERIFICATION FLOW

01
RESOLVE
Issuer DID resolved against ENS on Ethereum.
02
VERIFY SIG
Multi-sig signature checked against on-chain owners.
03
CHECK STATUS
Revocation registry queried on Polygon.
04
CONFIRM
Credential confirmed valid and active.