{
    "tender_id": 5602211,
    "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": "2026-11-06T10:04:44Z",
            "content": "{\"url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/537299/nikiel-katoda-7\", \"buyer\": \"SPÓŁKA AKCYJNA ODLEWNIE POLSKIE\", \"title\": \"Nikiel katoda\", \"source\": \"eb2b_public\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"537299\", \"deadline_at\": \"2026-11-10T11:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-11-06T07:00:00Z\"}",
            "content_hash": "a6bed15543edc120b4462a430d13532e099f92829c6e19a3d007621b3aaca516",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "a776acf317a375e5e0399a0060d8bdbdfd8d12da79ee26c53d497539bf25a500",
            "actor": null,
            "seal": {
                "id": 14,
                "digest": "40311773b0ad96735478ea3fd2d0f50746aa4156eaa6f667f3f02f9a13460e6d",
                "file": "https://tenderiq.pl/rejestr/pieczec-14.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-14.txt.ots",
                "bitcoin_block": 974874
            }
        },
        {
            "version": 2,
            "recorded_at": "2026-11-07T02:45:46Z",
            "content": "{\"url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/537299/nikiel-katoda-7\", \"buyer\": \"SPÓŁKA AKCYJNA ODLEWNIE POLSKIE\", \"title\": \"Nikiel katoda\", \"source\": \"eb2b_public\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"537299\", \"deadline_at\": \"2026-11-10T11:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-11-06T07:00:00Z\", \"procedure_url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/537299/nikiel-katoda-7\"}",
            "content_hash": "8ff8df688f4643ee163fd08cd530efc1c70b5afd80e136fe16f27ff8e9ab3595",
            "prev_hash": "a776acf317a375e5e0399a0060d8bdbdfd8d12da79ee26c53d497539bf25a500",
            "hash": "ada59149ff271254bbd27d2932d455042d25adcff8368a4ea47c6bc88049d83c",
            "actor": null,
            "seal": {
                "id": 15,
                "digest": "f6c36eda82d4dc4a4cabf73097f0dd62e17d55fa4f2594c5f095c0de4855ff5a",
                "file": "https://tenderiq.pl/rejestr/pieczec-15.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-15.txt.ots",
                "bitcoin_block": 975002
            }
        }
    ]
}