{
    "tender_id": 4753988,
    "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": "2026-11-02T09:50:44Z",
            "content": "{\"url\": \"https://platformazakupowa.pl/transakcja/1401841\", \"buyer\": \"Komenda Wojewódzka Policji w Łodzi\", \"title\": \"Zakup materiałów biurowych z LOGO\", \"region\": \"zachodniopomorskie\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Polska\", \"source_id\": \"1401841\", \"deadline_at\": \"2026-11-04T10:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-11-02T08:06:00Z\", \"notice_number\": \"1401841\"}",
            "content_hash": "788fa2772ae87d25dbb59ce224e8129cac3974ae681d391aceee2ad93e4e2585",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "e85dfeb45a8cb707ec36d37bd03dc35cb7d503df38e91f0371924ae1d2513805",
            "actor": null,
            "seal": {
                "id": 10,
                "digest": "297505af1d9d820e84b46bcdd40ae11b1ffc912134eeb69a764090ac7f9838b4",
                "file": "https://tenderiq.pl/rejestr/pieczec-10.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-10.txt.ots",
                "bitcoin_block": 974314
            }
        },
        {
            "version": 2,
            "recorded_at": "2026-11-02T13:45:57Z",
            "content": "{\"url\": \"https://platformazakupowa.pl/transakcja/1401841\", \"buyer\": \"Komenda Wojewódzka Policji w Łodzi\", \"title\": \"Zakup materiałów biurowych z LOGO\", \"region\": \"zachodniopomorskie\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Polska\", \"source_id\": \"1401841\", \"deadline_at\": \"2026-11-04T10:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-11-02T08:06:00Z\", \"notice_number\": \"1401841\", \"procedure_url\": \"https://platformazakupowa.pl/transakcja/1401841\"}",
            "content_hash": "77975048ea13cdeff4e122dffea2d83677482c403f12e371242f8351a89fa17b",
            "prev_hash": "e85dfeb45a8cb707ec36d37bd03dc35cb7d503df38e91f0371924ae1d2513805",
            "hash": "7e8fd60728d9abc1e3c5bb3811e1a49217ad95d24cadf90e570d205c2bc277f7",
            "actor": null,
            "seal": {
                "id": 10,
                "digest": "297505af1d9d820e84b46bcdd40ae11b1ffc912134eeb69a764090ac7f9838b4",
                "file": "https://tenderiq.pl/rejestr/pieczec-10.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-10.txt.ots",
                "bitcoin_block": 974314
            }
        }
    ]
}