{
  "$schema":"https://json-schema.org/draft/2020-12/schema",
  "$id":"urn:checkthisfile:integrity-status:v1",
  "title":"Dated integrity status observation; not proof of current offline status",
  "type":"object","additionalProperties":false,
  "required":["schema","publicId","status","observedAt","revokedAt"],
  "properties":{
    "schema":{"const":"urn:checkthisfile:integrity-status:v1"},
    "publicId":{"type":"string","pattern":"^ctfi_[A-Za-z0-9_-]{32}$"},
    "status":{"enum":["current","superseded","revoked"]},
    "observedAt":{"type":"string","format":"date-time"},
    "revokedAt":{"type":["string","null"],"format":"date-time"}
  }
}