{
    "tender_id": 5257231,
    "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": "2026-11-04T21:13:04Z",
            "content": "{\"url\": \"https://zemlab.logintrade.net/portal,szczegolyZapytaniaOfertowe,37e5c57ee10d5225278fcb3c7fe0d10e.html\", \"buyer\": \"ZEM Łabędy Sp. z o.o.\", \"title\": \"K2600828 - WKRĘTY DO DREWNA\", \"region\": \"slaskie\", \"source\": \"logintrade_central\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"śląskie\", \"source_id\": \"zemlab-37e5c57ee10d5225278fcb3c7fe0d10e\", \"deadline_at\": \"2026-11-09T07:00:00Z\", \"notice_type\": \"Zapytanie ofertowe\", \"published_at\": \"2026-11-04T07:10:00Z\"}",
            "content_hash": "ddad15316fe339def88d64c692e40a1a2503babcf5ae260727bdd749d77702c4",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "8b5ec461668b7e9dd7620bf9744f3dc7383dd84e0a402f3334ac4aa6db77f261",
            "actor": null,
            "seal": {
                "id": 12,
                "digest": "e23c0f5a7e440e937f514487a150dc1be40887f39a941304e364e5e94a4b77fc",
                "file": "https://tenderiq.pl/rejestr/pieczec-12.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-12.txt.ots",
                "bitcoin_block": 974604
            }
        },
        {
            "version": 2,
            "recorded_at": "2026-11-05T00:17:53Z",
            "content": "{\"url\": \"https://zemlab.logintrade.net/portal,szczegolyZapytaniaOfertowe,37e5c57ee10d5225278fcb3c7fe0d10e.html\", \"buyer\": \"ZEM Łabędy Sp. z o.o\", \"title\": \"K2600828 - WKRĘTY DO DREWNA\", \"region\": \"slaskie\", \"source\": \"logintrade_central\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"zemlab-37e5c57ee10d5225278fcb3c7fe0d10e\", \"deadline_at\": \"2026-11-09T07:00:00Z\", \"notice_type\": \"Zapytanie ofertowe\", \"published_at\": \"2026-11-04T11:15:00Z\"}",
            "content_hash": "00c21b97d22cc6a68614f799639b73599027e690e35ccdf00b127e33c305a3d0",
            "prev_hash": "8b5ec461668b7e9dd7620bf9744f3dc7383dd84e0a402f3334ac4aa6db77f261",
            "hash": "8a0723f05e2c931bd4ad55bb366b433788feaef3ed1aa6b539e9ab891bce8c41",
            "actor": null,
            "seal": null
        }
    ]
}