Zoogma

{
  // Definitions used in the credential (e.g. what belongs in a
  // VerifiableCredential or AuthorizedTradingPartnerCredential)
  "@context": [
    "https://www.w3.org/2018/credentials/v1",
    "https://www.fda.gov/atp/v1/credentials",   // Maybe defined by FDA?
    "https://www.atp.gov/v1/credentials"         // Or by a consortium?
  ],

  // Identifier for this credential. Alternately a DID, e.g.
  // "did:ledgerdomain:atp:v1:f2f12eb1a522e7d1596fed2d7692f993df703eb8819eec5f7e98951a5aeeba0d"
  "id": "https://atp.ledgerdomain.com/v1/credentials/f2f12eb1a522e7d1596fed2d7692f993df703eb8819eec5f7e98951a5aeeba0d",

  // Type(s) of this credential
  "type": [
    "VerifiableCredential",
    "AuthorizedTradingPartnerCredential"
  ],

  // Entity that issued the credential (could also be a DID)
  "issuer": "https://atp.ledgerdomain.com/v1/credentials/c7afdc84362a388a6e1398173b5a88fa6322c5e4eb7fd4961234661170647722",

  "issuanceDate": "2010-01-01T19:23:24Z",
  "expirationDate": "2020-01-01T19:23:24Z",

  // Claims about the subject
  "credentialSubject": {
    // Identifies the subject itself (distinct from the credential id)
    "id": "https://atp.ledgerdomain.com/v1/subjects/92fcb91eacb8b91874fd1c45f05adf2b6265d37fbcbcf3c2cfa51e5dbc0bd57a",
    // What kind of ATP entity this is, and therefore what to expect below
    "ATPEntityType": "Dispenser",
    // ATP-specific data — individual attributes can be revealed or hidden
    // via selective-disclosure (ZKP) signatures
    "ATPDispenserState": "CA",
    "ATPDispenserLicenseNumber": "58934085943",
    "ATPDispenserName": "Fancy Pharmacy",
    "ATPDispenserPhoneNumber": "1-800-SO-FANCY"
  },

  // Digital signature on the credential by the issuer. W3C defines several
  // types: EcdsaSecp256k1Signature2019, Ed25519Signature2018, RsaSignature2018…
  "proof": {
    "type": "EcdsaSecp256k1Signature2019",
    "created": "2010-01-01T19:23:24Z",
    "expires": "2020-01-01T19:23:24Z",
    "proofPurpose": "assertionMethod",
    "verificationMethod": "https://atp.ledgerdomain.com/v1/credentials/c7afdc84362a388a6e1398173b5a88fa6322c5e4eb7fd4961234661170647722#public-key-3",
    "jws": "XXX"
  }
}

{
  // Definitions used in the presentation
  "@context": [
    "https://www.w3.org/2018/credentials/v1",
    "https://www.fda.gov/atp/v1/credentials",   // Maybe defined by FDA?
    "https://www.atp.gov/v1/credentials"         // Or by a consortium?
  ],
  // The credentials themselves
  "verifiableCredential": [
    { … }   // omitted; derived from the VC above
  ],
  // Digital signature by the credential holder on the presentation
  "proof": {
    "type": "RsaSignature2018",
    "created": "<timestamp>",
    "proofPurpose": "authentication",
    // Public key of the holder — the subject of the ATP credential
    "verificationMethod": "https://atp.ledgerdomain.com/v1/subjects/92fcb91eacb8b91874fd1c45f05adf2b6265d37fbcbcf3c2cfa51e5dbc0bd57a#public-key-1",
    // "challenge" and "domain" prevent replay attacks
    "challenge": "1f44d55f-f161-4938-a659-f8026467f126",
    "domain": "4jt78h47fh47",
    "jws": "YYY"
  }
}