{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "id": "https://w3id.org/blockcerts/schema/1.2/issuer-id-1.2.json",
  "type": "object",
  "properties": {
    "issuerKeys": {
      "type": "array",
      "description": "list of issuer keys, listed in descending date order (most recent first). V1.2 change: renamed from issuer_key, added optional invalidated field.",
      "items": {
        "type": "object",
        "properties": {
          "date": {
            "type": "string",
            "format": "date-time",
            "description": "ISO-8601 formatted date time the key was activated."
          },
          "key": {
            "type": "string",
            "description": "Bitcoin address (compressed public key, usually 24 characters) that the issuer uses to issue the certificates."
          },
          "invalidated": {
            "type": "string",
            "format": "date-time",
            "description": "Optional ISO-8601 formatted date time the key was invalidated."
          }
        },
        "additionalProperties": false,
        "required": [
          "date",
          "key"
        ]
      }
    },
    "revocationKeys": {
      "type": "array",
      "description": "list of revocation keys, listed in descending date order (most recent first). V1.2 changes: renamed from revocation_key, added optional invalidated field.",
      "items": {
        "type": "object",
        "properties": {
          "date": {
            "type": "string",
            "format": "date-time",
            "description": "ISO-8601 formatted date time the key was activated."
          },
          "key": {
            "type": "string",
            "description": "Bitcoin address (compressed public key, usually 24 characters) that the issuer uses to revoke the certificates."
          },
          "invalidated": {
            "type": "string",
            "format": "date-time",
            "description": "Optional ISO-8601 formatted date time the key was invalidated."
          }
        },
        "additionalProperties": false,
        "required": [
          "date",
          "key"
        ]
      }
    },
    "id": {
      "description": "The URL of the issuer's website or homepage",
      "type": "string",
      "format": "uri"
    },
    "name": {
      "description": "Human-readable name of the issuing entity",
      "type": "string"
    },
    "email": {
      "type": "string",
      "format": "email",
      "description": "Contact address for the individual or organization."
    },
    "url": {
      "description": "The URL where the issuer's certificates can be found",
      "type": "string",
      "format": "uri"
    },
    "introductionURL":  {
      "description": "The URL hosting the issuer's introduction endpoint",
      "type": "string",
      "format": "uri"
    },
    "image": {
      "type": "string",
      "pattern": "data:image/png;base64,",
      "description": "Data URI; a base-64 encoded png image of the issuer's image. https://en.wikipedia.org/wiki/Data_URI_scheme"
    }
  },
  "additionalProperties": false,
  "required": [
    "issuerKeys",
    "revocationKeys",
    "id",
    "name",
    "email",
    "url",
    "introductionURL",
    "image"
  ]
}