{
  "issuer": "GPdI Kalideres Permai",
  "purpose": "Letter authenticity verification (bukti keaslian). NOT tanda tangan elektronik tersertifikasi under UU ITE / PP 71/2019.",
  "canonical_payload": "v1|nomor|tanggal|sha256(perihal)[0:8]|sha256(tujuan)[0:8]|penanda_tangan|key_id",
  "keys": [
    {
      "key_id": "gpdi-kp-2026a",
      "alg": "Ed25519",
      "public_key": "q5kVmP7Nj31ImjJKvoXJAB4Z9it8dQlWcpKbKGSHVdU",
      "status": "active",
      "created_at": "2026-08-11T23:55:14.619Z",
      "retired_at": null
    }
  ]
}