{
    "tender_id": 4780131,
    "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": "2026-11-02T13:57:59Z",
            "content": "{\"url\": \"https://bogdanka.eb2b.com.pl/open-preview-auction.html/154137/elementy-pneumatyki-prema-dostawa-68\", \"buyer\": \"LUBELSKI WĘGIEL BOGDANKA S.A.\", \"title\": \"ELEMENTY PNEUMATYKI PREMA - DOSTAWA\", \"source\": \"bogdanka_eb2b\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"154137\", \"deadline_at\": \"2026-11-04T11:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-11-02T13:30:00Z\"}",
            "content_hash": "60309ac0c8f291b897b70e55de9e88c65b67a7312233e73ca2be3ef2aa540b5a",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "7b8a4c9df59ca077e4ac16d938610f1d45920e5735630f4c3e14ae9953189d6e",
            "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
            }
        }
    ]
}