{
    "tender_id": 4116053,
    "check": {
        "ok": true,
        "versions": 5,
        "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": "2026-10-30T09:46:50Z",
            "content": "{\"cpv\": \"90911200\", \"url\": \"https://ezamowienia.gov.pl/mo-client-board/bzp/notice-details/id/08df3661-559c-eafe-e2d6-6b000120ae0f\", \"buyer\": \"GMINA MIEJSKA KOŚCIAN\", \"title\": \"Usługa polegająca na utrzymaniu czystości pomieszczeń - 2 części\", \"region\": \"wielkopolskie\", \"source\": \"ezamowienia_notices\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Kościan, wielkopolskie\", \"buyer_nip\": \"6981805739\", \"source_id\": \"2026/BZP 00511746/01\", \"deadline_at\": \"2026-11-12T11:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-30T08:39:39Z\", \"notice_number\": \"2026/BZP 00511746/01\"}",
            "content_hash": "99e924cb7d8dd3ea183294c18ed767f55c820796d7b833db50e7f69a9c07cf44",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "a48bd601470a1b13d56379c18efd37b4d181fc502a3104f76a160b2202ac8846",
            "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": "2026-10-30T10:45:22Z",
            "content": "{\"cpv\": \"90911200\", \"url\": \"https://ezamowienia.gov.pl/mo-client-board/bzp/notice-details/id/08df3661-559c-eafe-e2d6-6b000120ae0f\", \"buyer\": \"GMINA MIEJSKA KOŚCIAN\", \"title\": \"Usługa polegająca na utrzymaniu czystości pomieszczeń - 2 części\", \"region\": \"wielkopolskie\", \"source\": \"ezamowienia_notices\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Kościan, wielkopolskie\", \"buyer_nip\": \"6981805739\", \"source_id\": \"2026/BZP 00511746/01\", \"deadline_at\": \"2026-11-12T11:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-30T08:39:39Z\", \"notice_number\": \"2026/BZP 00511746/01\", \"procedure_url\": \"https://platformazakupowa.pl/transakcja/1401099\"}",
            "content_hash": "697408cce468804ea11bac07d60ccdae45daab9daf52003b890a64df3d041ce8",
            "prev_hash": "a48bd601470a1b13d56379c18efd37b4d181fc502a3104f76a160b2202ac8846",
            "hash": "fbb12389c5ef43356d7755f72ccd4c17f6a135ba7cdf1e672972ce38edac4e42",
            "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": "2026-10-30T14:04:34Z",
            "content": "{\"cpv\": \"90910000\", \"url\": \"https://ezamowienia.gov.pl/mo-client-board/bzp/notice-details/id/08df3661-559c-eafe-e2d6-6b000120ae0f\", \"buyer\": \"GMINA MIEJSKA KOŚCIAN\", \"title\": \"Usługa polegająca na utrzymaniu czystości pomieszczeń - 2 części\", \"region\": \"wielkopolskie\", \"source\": \"ezamowienia_notices\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Kościan, wielkopolskie\", \"source_id\": \"2026/BZP 00511746/01\", \"deadline_at\": \"2026-11-12T11:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-30T08:39:39Z\", \"notice_number\": \"2026/BZP 00511746/01\", \"procedure_url\": \"https://platformazakupowa.pl/transakcja/1401099\"}",
            "content_hash": "f2e5ee1ef2bc3b53a335932e2ae9cac7598ab31c4c3818cf0a284745bbf82f1b",
            "prev_hash": "fbb12389c5ef43356d7755f72ccd4c17f6a135ba7cdf1e672972ce38edac4e42",
            "hash": "efbe8228295fbc913cd6aa3b56a50b6803242037e7bb873699df2be440fc342a",
            "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": 4,
            "recorded_at": "2026-10-30T16:18:10Z",
            "content": "{\"cpv\": \"90911200\", \"url\": \"https://ezamowienia.gov.pl/mo-client-board/bzp/notice-details/id/08df3661-559c-eafe-e2d6-6b000120ae0f\", \"buyer\": \"GMINA MIEJSKA KOŚCIAN\", \"title\": \"Usługa polegająca na utrzymaniu czystości pomieszczeń - 2 części\", \"region\": \"wielkopolskie\", \"source\": \"ezamowienia_notices\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Kościan, wielkopolskie\", \"buyer_nip\": \"6981805739\", \"source_id\": \"2026/BZP 00511746/01\", \"deadline_at\": \"2026-11-12T11:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-30T08:39:39Z\", \"notice_number\": \"2026/BZP 00511746/01\", \"procedure_url\": \"https://platformazakupowa.pl/transakcja/1401099\"}",
            "content_hash": "697408cce468804ea11bac07d60ccdae45daab9daf52003b890a64df3d041ce8",
            "prev_hash": "efbe8228295fbc913cd6aa3b56a50b6803242037e7bb873699df2be440fc342a",
            "hash": "784906fba01887f98b9d771a23bfaedae7616e79b580e4529eb8d68d2d4fd02e",
            "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": 5,
            "recorded_at": "2026-10-31T02:14:11Z",
            "content": "{\"cpv\": \"90910000\", \"url\": \"https://ezamowienia.gov.pl/mo-client-board/bzp/notice-details/id/08df3661-559c-eafe-e2d6-6b000120ae0f\", \"buyer\": \"GMINA MIEJSKA KOŚCIAN\", \"title\": \"Usługa polegająca na utrzymaniu czystości pomieszczeń - 2 części\", \"region\": \"wielkopolskie\", \"source\": \"ezamowienia_notices\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Kościan, wielkopolskie\", \"source_id\": \"2026/BZP 00511746/01\", \"deadline_at\": \"2026-11-12T11:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-30T08:39:39Z\", \"notice_number\": \"2026/BZP 00511746/01\", \"procedure_url\": \"https://platformazakupowa.pl/transakcja/1401099\"}",
            "content_hash": "f2e5ee1ef2bc3b53a335932e2ae9cac7598ab31c4c3818cf0a284745bbf82f1b",
            "prev_hash": "784906fba01887f98b9d771a23bfaedae7616e79b580e4529eb8d68d2d4fd02e",
            "hash": "2e9999ca009239e8577e72926471e6394527658f06ff2292f190eba44f3b8749",
            "actor": null,
            "seal": null
        }
    ]
}