{
    "tender_id": 4021588,
    "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": "2026-10-29T19:38:31Z",
            "content": "{\"cpv\": \"42130000\", \"url\": \"https://oneplace.marketplanet.pl/zapytania-ofertowe-przetargi/-/rfp/view/3861565/napedy-hydrauliczne-podzespoly-mechaniczne-niezbedne-do-konstruowanej-walcarki-laboratoryjnej-\", \"buyer\": \"Politechnika Lubelska\", \"title\": \"Napędy hydrauliczne (Podzespoły mechaniczne niezbędne do konstruowanej walcarki laboratoryjnej)\", \"source\": \"oneplace_marketplanet\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"3861565\", \"deadline_at\": \"2026-11-04T09:00:00Z\", \"notice_type\": \"Zapytanie ofertowe\", \"published_at\": \"2026-10-29T19:38:31Z\"}",
            "content_hash": "0b955211ccbbcf102582e43c4493360e0474b07d320b95e5a30020fb0307e2fb",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "2bbd5a81653b2f19fc187abcf830a2c5c06ebb7e9e5ad6379d3e78707de91f80",
            "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": "2026-10-29T19:46:05Z",
            "content": "{\"cpv\": \"42130000\", \"url\": \"https://oneplace.marketplanet.pl/zapytania-ofertowe-przetargi/-/rfp/view/3861565/napedy-hydrauliczne-podzespoly-mechaniczne-niezbedne-do-konstruowanej-walcarki-laboratoryjnej-\", \"buyer\": \"Politechnika Lubelska\", \"title\": \"Napędy hydrauliczne (Podzespoły mechaniczne niezbędne do konstruowanej walcarki laboratoryjnej)\", \"source\": \"oneplace_marketplanet\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"3861565\", \"deadline_at\": \"2026-11-04T09:00:00Z\", \"notice_type\": \"Zapytanie ofertowe\", \"published_at\": \"2026-10-29T19:38:31Z\", \"procedure_url\": \"https://platformazakupowa.pl/transakcja/1400930\"}",
            "content_hash": "0998e09cb92d876a9759937ac36ae7bebaf9df211d5287fef44e41b9382a1897",
            "prev_hash": "2bbd5a81653b2f19fc187abcf830a2c5c06ebb7e9e5ad6379d3e78707de91f80",
            "hash": "a0c193fd561117925864e3206e81f3557795850ebcc3191f33761575ee0ee0c0",
            "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
            }
        }
    ]
}