{
    "tender_id": 3359737,
    "check": {
        "ok": true,
        "versions": 2,
        "broken_at": null
    },
    "formula": "content_hash = sha256(content); hash = sha256(prev_hash + \"\\n\" + tender_id + \"\\n\" + version + \"\\n\" + recorded_at + \"\\n\" + content_hash [+ \"\\n\" + actor, when the version has one])",
    "versions": [
        {
            "version": 1,
            "recorded_at": "2026-10-26T09:36:31Z",
            "content": "{\"cpv\": \"45232430\", \"url\": \"https://ted.europa.eu/pl/notice/-/detail/738453-2026\", \"buyer\": \"Vergabestelle Landeshauptstadt Stuttgart\", \"title\": \"Niemcy – Roboty w zakresie uzdatniania wody – Badetechnische Anlagen\", \"source\": \"ted_deu\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"DE111, DEU, DE111, DEU\", \"source_id\": \"738453-2026\", \"deadline_at\": \"2026-12-03T10:30:00Z\", \"notice_type\": \"Ogłoszenie TED\", \"published_at\": \"2026-10-26T01:00:00Z\"}",
            "content_hash": "610059f5d3247982dfcbdd23063cdbe0488de1a4a36f7246a2a113fcb51d9e40",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "dafab7af170f8f64f514344595f8bfbc58785d78557ed8353cd60d65c6b2d8d6",
            "actor": null,
            "seal": {
                "id": 3,
                "digest": "1119fd2ade60dc88ac794742ff488b9486e8a488f9d77cc6d6a9444474dc1c77",
                "file": "https://tenderiq.pl/rejestr/pieczec-3.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-3.txt.ots",
                "bitcoin_block": 973309
            }
        },
        {
            "version": 2,
            "recorded_at": "2026-10-26T23:16:36Z",
            "content": "{\"cpv\": \"45232430\", \"url\": \"https://ted.europa.eu/pl/notice/-/detail/738453-2026\", \"buyer\": \"Vergabestelle Landeshauptstadt Stuttgart\", \"title\": \"Niemcy – Roboty w zakresie uzdatniania wody – Układy hydrotechniczne\", \"source\": \"ted_deu\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"DE111, DEU, DE111, DEU\", \"source_id\": \"738453-2026\", \"deadline_at\": \"2026-12-03T10:30:00Z\", \"notice_type\": \"Ogłoszenie TED\", \"published_at\": \"2026-10-26T01:00:00Z\"}",
            "content_hash": "a1f83170d3f129efe43d9103a61bf7d9b3aa500e3c0a170c081267690d821995",
            "prev_hash": "dafab7af170f8f64f514344595f8bfbc58785d78557ed8353cd60d65c6b2d8d6",
            "hash": "3a5252cd4c18fb829185a5089a4b22e2774f620a71a0181866032baadd5539fd",
            "actor": null,
            "seal": {
                "id": 4,
                "digest": "1a6d1144791ca08d9453bd1c8d38a6c251eb74cb6d377626fde25c11a52ccc7a",
                "file": "https://tenderiq.pl/rejestr/pieczec-4.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-4.txt.ots",
                "bitcoin_block": 973472
            }
        }
    ]
}