{
 "chain_ok": true,
 "count": 1,
 "exported_at": "2026-09-09T15:02:54+00:00",
 "receipts": [
  {
   "v": 1,
   "maker": "zuboland",
   "purpose": "UNIPROOF 受付開始の案内メール（1通のみ）",
   "text_hash": "b55d1c1aa0a12881f4609e5c2db2ff92311a4e18d82af437b4a2266d5cd9465f",
   "subject_hmac": "d98ed964e57842ae513b9c15cedb09c7655c4277bda4de7c595f4084842fb6a9",
   "t": "2026-09-09T15:02:54+00:00",
   "prev": "genesis",
   "id": "d8a528816d13ff991bd422b0e72bb350"
  }
 ]
}