{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "urn:checkthisfile:integrity:v1",
  "title": "CheckThisFile hash-only integrity receipt v1",
  "type": "object",
  "additionalProperties": false,
  "required": ["schema","schemaUrl","canonicalization","type","recordId","publicId","organizationId","receivedAt","declared","referencesCommitment","version","previousVersion","verificationUrl","limitations"],
  "properties": {
    "schema": {"const":"urn:checkthisfile:integrity:v1"},
    "schemaUrl": {"type":"string","format":"uri"},
    "canonicalization": {"const":"RFC8785"},
    "type": {"const":"hash_registration"},
    "recordId": {"type":"string","format":"uuid"},
    "publicId": {"type":"string","pattern":"^ctfi_[A-Za-z0-9_-]{32}$"},
    "organizationId": {"type":"string","minLength":1},
    "receivedAt": {"type":"string","format":"date-time"},
    "declared": {
      "type":"object","additionalProperties":false,"required":["sha256","sizeBytes","mimeType","generatedAt"],
      "properties": {
        "sha256":{"type":"string","pattern":"^[a-f0-9]{64}$"},
        "sizeBytes":{"type":"integer","minimum":0,"maximum":9007199254740991},
        "mimeType":{"type":"string","maxLength":127},
        "generatedAt":{"type":"string","format":"date-time"}
      }
    },
    "referencesCommitment":{"type":"string","pattern":"^[a-f0-9]{64}$"},
    "version":{"type":"integer","minimum":1,"maximum":2147483647},
    "previousVersion":{"type":["integer","null"],"minimum":1,"maximum":2147483647},
    "verificationUrl":{"type":"string","format":"uri"},
    "limitations":{"type":"array","minItems":4,"items":{"type":"string"}}
  }
}