{
    "tender_id": 4022235,
    "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": "2026-10-29T19:39:42Z",
            "content": "{\"cpv\": \"24312200\", \"url\": \"https://oneplace.marketplanet.pl/zapytania-ofertowe-przetargi/-/rfp/view/3860877/dostawa-koagulantu-do-chemicznego-stracania-fosforu-w-sciekach-dla-mpwik-sp-z-o-o-we-wloclawku\", \"buyer\": \"Miejskie Przedsiębiorstwo Wodociągów i Kanalizacji Spółka z o.o. we Włocławku\", \"title\": \"Dostawa koagulantu do chemicznego strącania fosforu w ściekach dla MPWIK Sp. z o. o. we Włocławku\", \"source\": \"oneplace_marketplanet\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"3860877\", \"deadline_at\": \"2026-11-09T10:00:00Z\", \"notice_type\": \"Zapytanie ofertowe\", \"published_at\": \"2026-10-29T19:39:42Z\"}",
            "content_hash": "47d4d15a370cb0ff0394b8f2b47bf24a9dc4ee1becdb77698f620236f7adbf63",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "bbc73f56ba29100476b714f0fde8aea23b9e7b2f9152b264f854864032a9a97a",
            "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": "2026-10-29T19:46:01Z",
            "content": "{\"cpv\": \"24312200\", \"url\": \"https://oneplace.marketplanet.pl/zapytania-ofertowe-przetargi/-/rfp/view/3860877/dostawa-koagulantu-do-chemicznego-stracania-fosforu-w-sciekach-dla-mpwik-sp-z-o-o-we-wloclawku\", \"buyer\": \"Miejskie Przedsiębiorstwo Wodociągów i Kanalizacji Spółka z o.o. we Włocławku\", \"title\": \"Dostawa koagulantu do chemicznego strącania fosforu w ściekach dla MPWIK Sp. z o. o. we Włocławku\", \"source\": \"oneplace_marketplanet\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"3860877\", \"deadline_at\": \"2026-11-09T10:00:00Z\", \"notice_type\": \"Zapytanie ofertowe\", \"published_at\": \"2026-10-29T19:39:42Z\", \"procedure_url\": \"https://platformazakupowa.pl/transakcja/1400604\"}",
            "content_hash": "909cdf228abfb4589e33a606646874a8bbcfe2d9cf7deede9d41b25583009304",
            "prev_hash": "bbc73f56ba29100476b714f0fde8aea23b9e7b2f9152b264f854864032a9a97a",
            "hash": "e9061c20cdacedf85ee5a617fdfa0cfe79e75a42c79dec11e2dc10cef9ee5879",
            "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
            }
        }
    ]
}