{
    "tender_id": 4120721,
    "check": {
        "ok": true,
        "versions": 4,
        "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": "2026-10-30T10:12:38Z",
            "content": "{\"url\": \"https://cognor.logintrade.net/portal,szczegolyZapytaniaOfertowe,d288e4c7ced291525a194d16bff865aa.html\", \"buyer\": \"Cognor SA oddział Ferrostal Łabędy w Gliwicach\", \"title\": \"193444 / SM / Okresowe badanie nieniszczące haków na suwnicach\", \"region\": \"slaskie\", \"source\": \"logintrade_central\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"śląskie\", \"source_id\": \"cognor-d288e4c7ced291525a194d16bff865aa\", \"deadline_at\": \"2026-11-06T09:00:00Z\", \"notice_type\": \"Zapytanie ofertowe\", \"published_at\": \"2026-10-30T09:01:00Z\"}",
            "content_hash": "5263e56dcabaf1b683bf3672a80db9964a0984ab27a0112caf4cd3c9ec0017bf",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "fed4e0f1de350c3ac6b1e4ad72a705da4553372003d2947943f80b8e40b887fe",
            "actor": null,
            "seal": {
                "id": 7,
                "digest": "a9f75e7ec6726860fada5c5807cac164b76cf44582f14a01cd7b4a36f579f813",
                "file": "https://tenderiq.pl/rejestr/pieczec-7.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-7.txt.ots",
                "bitcoin_block": 973897
            }
        },
        {
            "version": 2,
            "recorded_at": "2026-10-30T22:18:08Z",
            "content": "{\"cpv\": \"50413200\", \"url\": \"https://cognor.logintrade.net/portal,szczegolyZapytaniaOfertowe,d288e4c7ced291525a194d16bff865aa.html\", \"buyer\": \"Cognor SA oddział Ferrostal Łabędy w Gliwicach\", \"title\": \"193444 / SM / Okresowe badanie nieniszczące haków na suwnicach\", \"region\": \"slaskie\", \"source\": \"logintrade_central\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"śląskie\", \"source_id\": \"cognor-d288e4c7ced291525a194d16bff865aa\", \"deadline_at\": \"2026-11-06T09:00:00Z\", \"notice_type\": \"Zapytanie ofertowe\", \"published_at\": \"2026-10-30T09:01:00Z\"}",
            "content_hash": "c3a0992c0460bda83820660d5478dee84f32b424235c53456b5f42f2a3096c31",
            "prev_hash": "fed4e0f1de350c3ac6b1e4ad72a705da4553372003d2947943f80b8e40b887fe",
            "hash": "a69b0dafd901d3faa874844e302306eacd6d96caaec257371b468d2146df701d",
            "actor": null,
            "seal": {
                "id": 7,
                "digest": "a9f75e7ec6726860fada5c5807cac164b76cf44582f14a01cd7b4a36f579f813",
                "file": "https://tenderiq.pl/rejestr/pieczec-7.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-7.txt.ots",
                "bitcoin_block": 973897
            }
        },
        {
            "version": 3,
            "recorded_at": "2026-10-31T01:48:37Z",
            "content": "{\"cpv\": \"50413200\", \"url\": \"https://cognor.logintrade.net/portal,szczegolyZapytaniaOfertowe,d288e4c7ced291525a194d16bff865aa.html\", \"buyer\": \"Cognor SA oddział Ferrostal Łabędy w Gliwicach\", \"title\": \"193444 / SM / Okresowe badanie nieniszczące haków na suwnicach\", \"region\": \"slaskie\", \"source\": \"logintrade_central\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"cognor-d288e4c7ced291525a194d16bff865aa\", \"deadline_at\": \"2026-11-06T09:00:00Z\", \"notice_type\": \"Zapytanie ofertowe\", \"published_at\": \"2026-10-30T12:03:00Z\"}",
            "content_hash": "fc3d3447c98f93f99ca65a4bd3adf02185a1721657db369863bb0c004fee4b0e",
            "prev_hash": "a69b0dafd901d3faa874844e302306eacd6d96caaec257371b468d2146df701d",
            "hash": "38332c5ab2670a547c16ddfdada1c3e4ebbeba389fb23e1da7cf70d3d6f6f13a",
            "actor": null,
            "seal": {
                "id": 8,
                "digest": "b9dfb65eef062a8f7633cee107df2b59fcca72ec5f093c9ceec0396cf65cd90d",
                "file": "https://tenderiq.pl/rejestr/pieczec-8.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-8.txt.ots",
                "bitcoin_block": 974039
            }
        },
        {
            "version": 4,
            "recorded_at": "2026-10-31T10:46:11Z",
            "content": "{\"cpv\": \"50413200\", \"url\": \"https://cognor.logintrade.net/portal,szczegolyZapytaniaOfertowe,d288e4c7ced291525a194d16bff865aa.html\", \"buyer\": \"Cognor SA oddział Ferrostal Łabędy w Gliwicach\", \"title\": \"193444 / SM / Okresowe badanie nieniszczące haków na suwnicach\", \"region\": \"slaskie\", \"source\": \"logintrade_central\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"cognor-d288e4c7ced291525a194d16bff865aa\", \"deadline_at\": \"2026-11-06T09:00:00Z\", \"notice_type\": \"Zapytanie ofertowe\", \"published_at\": \"2026-10-30T12:03:00Z\", \"procedure_url\": \"https://cognor.logintrade.net/portal,szczegolyZapytaniaOfertowe,d288e4c7ced291525a194d16bff865aa.html\"}",
            "content_hash": "c7f6af78d340fde81cf2ebf9af5dbc28593075accda59dc88104c5c6be8fc0c2",
            "prev_hash": "38332c5ab2670a547c16ddfdada1c3e4ebbeba389fb23e1da7cf70d3d6f6f13a",
            "hash": "61330841443b64e7c29099ecf2e716ae7c155f30be0bcdacc819d9ba4e1d018b",
            "actor": null,
            "seal": {
                "id": 8,
                "digest": "b9dfb65eef062a8f7633cee107df2b59fcca72ec5f093c9ceec0396cf65cd90d",
                "file": "https://tenderiq.pl/rejestr/pieczec-8.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-8.txt.ots",
                "bitcoin_block": 974039
            }
        }
    ]
}