{
    "tender_id": 3601019,
    "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": "2026-10-27T13:58:41Z",
            "content": "{\"cpv\": \"34322500\", \"url\": \"https://polregio.eb2b.com.pl/open-preview-auction.html/535831/zapytanie-o-informacje-cenowa-dostawa-fabrycznie-nowych-nastawiaczy-klockow-hamulcowych-drv-1\", \"buyer\": \"POLREGIO S.A.\", \"title\": \"Zapytanie o informację cenową – dostawa fabrycznie nowych nastawiaczy klocków hamulcowych DRV.\", \"region\": \"lodzkie\", \"source\": \"polregio_eb2b\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"ŁÓDZKIE\", \"source_id\": \"535831\", \"deadline_at\": \"2026-11-03T11:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-27T12:30:00Z\"}",
            "content_hash": "2d528698fae8e2b81bbcb905fc73e88d3dea30fd92bf03a518c57a96656c2c49",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "6559b84b8028f9e6214af7b6c28358a0f198dad91101fff4cfcdc853118664d8",
            "actor": null,
            "seal": {
                "id": 4,
                "digest": "1a6d1144791ca08d9453bd1c8d38a6c251eb74cb6d377626fde25c11a52ccc7a",
                "file": "https://tenderiq.pl/rejestr/pieczec-4.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-4.txt.ots",
                "bitcoin_block": 973472
            }
        },
        {
            "version": 2,
            "recorded_at": "2026-10-27T19:35:46Z",
            "content": "{\"cpv\": \"34322500\", \"url\": \"https://polregio.eb2b.com.pl/open-preview-auction.html/535831/zapytanie-o-informacje-cenowa-dostawa-fabrycznie-nowych-nastawiaczy-klockow-hamulcowych-drv-1\", \"buyer\": \"POLREGIO S.A.\", \"title\": \"Zapytanie o informację cenową – dostawa fabrycznie nowych nastawiaczy klocków hamulcowych DRV.\", \"region\": \"lodzkie\", \"source\": \"polregio_eb2b\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"ŁÓDZKIE\", \"source_id\": \"535831\", \"deadline_at\": \"2026-11-03T11:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-27T12:30:00Z\", \"procedure_url\": \"https://polregio.eb2b.com.pl/open-preview-auction.html/535831/zapytanie-o-informacje-cenowa-dostawa-fabrycznie-nowych-nastawiaczy-klockow-hamulcowych-drv-1\"}",
            "content_hash": "1133b6d8ddfb13c6c612a443b138a655e37e16e0f20b2212b31910d463615445",
            "prev_hash": "6559b84b8028f9e6214af7b6c28358a0f198dad91101fff4cfcdc853118664d8",
            "hash": "d05e5d4a899abf55e21348d80037e2ed0cfcbb862fc98e4e776f97656b755fbc",
            "actor": null,
            "seal": {
                "id": 4,
                "digest": "1a6d1144791ca08d9453bd1c8d38a6c251eb74cb6d377626fde25c11a52ccc7a",
                "file": "https://tenderiq.pl/rejestr/pieczec-4.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-4.txt.ots",
                "bitcoin_block": 973472
            }
        }
    ]
}