{
    "tender_id": 4021008,
    "check": {
        "ok": true,
        "versions": 3,
        "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": "2026-10-29T19:35:21Z",
            "content": "{\"cpv\": \"32323500\", \"url\": \"https://platformazakupowa.pl/transakcja/1400952\", \"buyer\": \"Uniwersytet Warmińsko-Mazurski w Olsztynie\", \"title\": \"451/2026/TP-I/DZP Zakup sprzętu do systemu monitoringu CCTV do budynku Heweliusza 28 Przystań Kortowska\", \"region\": \"warminsko-mazurskie\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Polska\", \"source_id\": \"1400952\", \"deadline_at\": \"2026-11-12T09:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-29T19:35:25Z\", \"notice_number\": \"1400952\"}",
            "content_hash": "061de67f8a933602d66c04e4c5c9e3daeed0aa7922c644c0cc86ba3df5d524c1",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "25e427b923b08aebc8d2ffa533d28a7f071c25963dbcb50763198753b0c7af74",
            "actor": null,
            "seal": {
                "id": 6,
                "digest": "e733200881d78faed3c108fa90cea332062fa40f3af23fcfd3f901e311d96e33",
                "file": "https://tenderiq.pl/rejestr/pieczec-6.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-6.txt.ots",
                "bitcoin_block": 973754
            }
        },
        {
            "version": 2,
            "recorded_at": "2026-10-29T19:46:00Z",
            "content": "{\"cpv\": \"32323500\", \"url\": \"https://platformazakupowa.pl/transakcja/1400952\", \"buyer\": \"Uniwersytet Warmińsko-Mazurski w Olsztynie\", \"title\": \"451/2026/TP-I/DZP Zakup sprzętu do systemu monitoringu CCTV do budynku Heweliusza 28 Przystań Kortowska\", \"region\": \"warminsko-mazurskie\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Polska\", \"source_id\": \"1400952\", \"deadline_at\": \"2026-11-12T09:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-29T19:35:25Z\", \"notice_number\": \"1400952\", \"procedure_url\": \"https://platformazakupowa.pl/transakcja/1400952\"}",
            "content_hash": "61ca7039e029371beadfce3b7507cb048903cf8b3897f327cbe1aa8bfb2811b8",
            "prev_hash": "25e427b923b08aebc8d2ffa533d28a7f071c25963dbcb50763198753b0c7af74",
            "hash": "749a6c46006ad2adfda6b7c0cd4c87c6cf01261a78a832cf4e526b01e57a73d6",
            "actor": null,
            "seal": {
                "id": 6,
                "digest": "e733200881d78faed3c108fa90cea332062fa40f3af23fcfd3f901e311d96e33",
                "file": "https://tenderiq.pl/rejestr/pieczec-6.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-6.txt.ots",
                "bitcoin_block": 973754
            }
        },
        {
            "version": 3,
            "recorded_at": "2026-10-29T23:51:38Z",
            "content": "{\"cpv\": \"32323500\", \"url\": \"https://platformazakupowa.pl/transakcja/1400952\", \"buyer\": \"Uniwersytet Warmińsko-Mazurski w Olsztynie\", \"title\": \"451/2026/TP-I/DZP Zakup sprzętu do systemu monitoringu CCTV do budynku Heweliusza 28 Przystań Kortowska\", \"region\": \"warminsko-mazurskie\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Polska\", \"source_id\": \"1400952\", \"deadline_at\": \"2026-11-12T09:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-28T23:00:00Z\", \"notice_number\": \"1400952\", \"procedure_url\": \"https://platformazakupowa.pl/transakcja/1400952\"}",
            "content_hash": "a2a06817609cd7b6f0247b55d919d83a547855169cf95bcfbbe5fd9d36830b3c",
            "prev_hash": "749a6c46006ad2adfda6b7c0cd4c87c6cf01261a78a832cf4e526b01e57a73d6",
            "hash": "54710012a034715de60be660ebbd73415445c960f8fd17019a6be3be602c5ca1",
            "actor": null,
            "seal": null
        }
    ]
}