{
    "tender_id": 3756959,
    "check": {
        "ok": true,
        "versions": 1,
        "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": "2026-10-28T11:30:54Z",
            "content": "{\"cpv\": \"45210000\", \"url\": \"https://zamowienia.sidaspzp.pl/zamowienia/d5b0aad9-c9c8-41b1-94a6-65136c741165\", \"buyer\": \"Gmina Kleczew\", \"title\": \"Modernizacja świetlicy wiejskiej w Marszewie\", \"region\": \"wielkopolskie\", \"source\": \"sidas_pzp\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Kleczew\", \"source_id\": \"d5b0aad9-c9c8-41b1-94a6-65136c741165\", \"deadline_at\": \"2026-11-05T08:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-28T09:32:06Z\"}",
            "content_hash": "f255221894557035d6f817aa56746ad6b336c2c6ed883dc0678ef6078fd3b112",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "5eae16733ac2f33b4c54984ee394c8cf66209054b4bcac8403733a0b494d0021",
            "actor": null,
            "seal": {
                "id": 5,
                "digest": "0659ce1e2aadd7f69ed1ff4603a4290c070eaa14bbeed28a3c9a7cc2127acae9",
                "file": "https://tenderiq.pl/rejestr/pieczec-5.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-5.txt.ots",
                "bitcoin_block": 973609
            }
        }
    ]
}