{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "instruction_id": {
      "type": "string",
      "pattern": "^pi_[0-7][0-9A-HJKMNP-TV-Z]{25}(?![\\s\\S])"
    },
    "attestation": {
      "type": "string",
      "enum": [
        "purged",
        "not_held",
        "legal_hold"
      ]
    },
    "at": {
      "type": "string",
      "format": "date-time",
      "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d:[0-5]\\d(?:\\.\\d+)?(?:Z))$"
    },
    "note": {
      "type": "string",
      "maxLength": 2048
    },
    "proof": {
      "anyOf": [
        {
          "type": "object",
          "properties": {
            "type": {
              "type": "string",
              "const": "jws"
            },
            "alg": {
              "type": "string",
              "const": "ES256"
            },
            "kid": {
              "type": "string",
              "pattern": "^[A-Za-z0-9_-]{42}[AEIMQUYcgkosw048]$"
            },
            "jws": {
              "type": "string",
              "pattern": "^[A-Za-z0-9_-]+\\.\\.[A-Za-z0-9_-]+$"
            }
          },
          "required": [
            "type",
            "alg",
            "kid",
            "jws"
          ],
          "additionalProperties": false
        },
        {
          "type": "null"
        }
      ]
    }
  },
  "required": [
    "instruction_id",
    "attestation",
    "at",
    "note",
    "proof"
  ],
  "additionalProperties": false
}