{
    "tender_id": 4139201,
    "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": "2026-10-30T13:44:24Z",
            "content": "{\"cpv\": \"80000000\", \"url\": \"https://oneplace.marketplanet.pl/zapytania-ofertowe-przetargi/-/rfp/view/3863260/szkolenie-z-obszaru-wybranych-zagadnien-inzynierii-mechanicznej-i-materialowej-\", \"buyer\": \"31 Baza Lotnictwa Taktycznego w Poznaniu\", \"title\": \"Szkolenie z obszaru wybranych zagadnień inżynierii mechanicznej i materiałowej.\", \"region\": \"wielkopolskie\", \"source\": \"oneplace_marketplanet\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"3863260\", \"deadline_at\": \"2026-11-05T08:39:00Z\", \"notice_type\": \"Zapytanie ofertowe\", \"published_at\": \"2026-10-30T13:44:25Z\"}",
            "content_hash": "359328c498988970b675fb52d3d0040d4e592d99ff42d8c320ad0c2864237080",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "92a98ab9cef6af3b953f007161519734c98acb86b15570efa94a9c953e14f5f4",
            "actor": null,
            "seal": {
                "id": 7,
                "digest": "a9f75e7ec6726860fada5c5807cac164b76cf44582f14a01cd7b4a36f579f813",
                "file": "https://tenderiq.pl/rejestr/pieczec-7.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-7.txt.ots",
                "bitcoin_block": 973897
            }
        },
        {
            "version": 2,
            "recorded_at": "2026-10-30T13:45:40Z",
            "content": "{\"cpv\": \"80000000\", \"url\": \"https://oneplace.marketplanet.pl/zapytania-ofertowe-przetargi/-/rfp/view/3863260/szkolenie-z-obszaru-wybranych-zagadnien-inzynierii-mechanicznej-i-materialowej-\", \"buyer\": \"31 Baza Lotnictwa Taktycznego w Poznaniu\", \"title\": \"Szkolenie z obszaru wybranych zagadnień inżynierii mechanicznej i materiałowej.\", \"region\": \"wielkopolskie\", \"source\": \"oneplace_marketplanet\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"3863260\", \"deadline_at\": \"2026-11-05T08:39:00Z\", \"notice_type\": \"Zapytanie ofertowe\", \"published_at\": \"2026-10-30T13:44:25Z\", \"procedure_url\": \"https://platformazakupowa.pl/transakcja/1401204\"}",
            "content_hash": "c2dc58ee290701f1b573d1c031343022ca7302dd9d5e1bfc98414889f8d60cbc",
            "prev_hash": "92a98ab9cef6af3b953f007161519734c98acb86b15570efa94a9c953e14f5f4",
            "hash": "34845108bf3f3cac661fa2fa497d96128c6f6998b12a82a559207e0e1586da48",
            "actor": null,
            "seal": {
                "id": 7,
                "digest": "a9f75e7ec6726860fada5c5807cac164b76cf44582f14a01cd7b4a36f579f813",
                "file": "https://tenderiq.pl/rejestr/pieczec-7.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-7.txt.ots",
                "bitcoin_block": 973897
            }
        }
    ]
}