{
    "tender_id": 6308513,
    "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": "2026-11-10T09:32:53Z",
            "content": "{\"cpv\": \"33696500\", \"url\": \"https://umcs.ezamawiajacy.pl/pn/UMCS/demand/notice/public/243046/details\", \"buyer\": \"Uniwersytet Marii Curie-Skłodowskiej w Lublinie\", \"title\": \"Dostawa materiałów do badań\", \"region\": \"lubelskie\", \"source\": \"umcs_ezamawiajacy\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"243046\", \"deadline_at\": \"2026-11-16T09:00:00Z\", \"notice_type\": \"Postępowanie wyłączone z PZP\", \"published_at\": \"2026-11-10T08:31:00Z\"}",
            "content_hash": "1572c501bf1f9c7063708885b38fdb177c29376a5edb5aa7a54d39b7b6da7c63",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "b89d04e1065bc820af6afd4e934ee4ddbe598ffa5fdb8aee668370bc1a9a9a96",
            "actor": null,
            "seal": null
        },
        {
            "version": 2,
            "recorded_at": "2026-11-10T09:45:21Z",
            "content": "{\"cpv\": \"33696500\", \"url\": \"https://umcs.ezamawiajacy.pl/pn/UMCS/demand/notice/public/243046/details\", \"buyer\": \"Uniwersytet Marii Curie-Skłodowskiej w Lublinie\", \"title\": \"Dostawa materiałów do badań\", \"region\": \"lubelskie\", \"source\": \"umcs_ezamawiajacy\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"243046\", \"deadline_at\": \"2026-11-16T09:00:00Z\", \"notice_type\": \"Postępowanie wyłączone z PZP\", \"published_at\": \"2026-11-10T08:31:00Z\", \"procedure_url\": \"https://umcs.ezamawiajacy.pl/pn/UMCS/demand/notice/public/243039/details\"}",
            "content_hash": "2fc140f5273714eb5e8951285ba815a1a2812965619ac6456dbac962c5f6a893",
            "prev_hash": "b89d04e1065bc820af6afd4e934ee4ddbe598ffa5fdb8aee668370bc1a9a9a96",
            "hash": "b57af50ac8a60ff26bc112667153fca1e4c2a3ba9dfc6eb6317eadb804fd46fd",
            "actor": null,
            "seal": null
        }
    ]
}