{
    "tender_id": 4976902,
    "check": {
        "ok": true,
        "versions": 3,
        "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": "2026-11-03T11:10:40Z",
            "content": "{\"url\": \"https://platformazakupowa.pl/transakcja/1402922\", \"buyer\": \"31 Baza Lotnictwa Taktycznego w Poznaniu\", \"title\": \"Usługi szkolenia BHP\", \"region\": \"wielkopolskie\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Polska\", \"source_id\": \"1402922\", \"deadline_at\": \"2026-11-13T07:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-11-03T10:41:00Z\", \"notice_number\": \"1402922\"}",
            "content_hash": "65168f81b89fbab5744bd4bb144b1888588096b08bcb2083997d45060165fd6d",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "2fdb5257e0e07695d498e984f842ee0ae9e156ff8eb9505cc75b816d5935ee9a",
            "actor": null,
            "seal": {
                "id": 11,
                "digest": "e9a17a70070a65f95be452321715a138cbb650567f41e2bae0faa2ffd562bbbd",
                "file": "https://tenderiq.pl/rejestr/pieczec-11.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-11.txt.ots",
                "bitcoin_block": 974456
            }
        },
        {
            "version": 2,
            "recorded_at": "2026-11-03T14:45:45Z",
            "content": "{\"url\": \"https://platformazakupowa.pl/transakcja/1402922\", \"buyer\": \"31 Baza Lotnictwa Taktycznego w Poznaniu\", \"title\": \"Usługi szkolenia BHP\", \"region\": \"wielkopolskie\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Polska\", \"source_id\": \"1402922\", \"deadline_at\": \"2026-11-13T07:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-11-03T10:41:00Z\", \"notice_number\": \"1402922\", \"procedure_url\": \"https://platformazakupowa.pl/transakcja/1402922\"}",
            "content_hash": "45f420b416029bb5bb3911427f08be5b669319b7c61c2fee3e79383a7e1419a2",
            "prev_hash": "2fdb5257e0e07695d498e984f842ee0ae9e156ff8eb9505cc75b816d5935ee9a",
            "hash": "57de6908a620a3f0b3d962ade6daad0363a759a2a0e20f3c9c41d7b87e3dd0a3",
            "actor": null,
            "seal": {
                "id": 11,
                "digest": "e9a17a70070a65f95be452321715a138cbb650567f41e2bae0faa2ffd562bbbd",
                "file": "https://tenderiq.pl/rejestr/pieczec-11.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-11.txt.ots",
                "bitcoin_block": 974456
            }
        },
        {
            "version": 3,
            "recorded_at": "2026-11-05T03:37:07Z",
            "content": "{\"url\": \"https://platformazakupowa.pl/transakcja/1402922\", \"buyer\": \"31 Baza Lotnictwa Taktycznego w Poznaniu\", \"title\": \"Usługi szkolenia BHP\", \"region\": \"wielkopolskie\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Polska\", \"source_id\": \"1402922\", \"deadline_at\": \"2026-11-13T07:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-11-03T10:41:00Z\", \"notice_number\": \"1402922\"}",
            "content_hash": "65168f81b89fbab5744bd4bb144b1888588096b08bcb2083997d45060165fd6d",
            "prev_hash": "57de6908a620a3f0b3d962ade6daad0363a759a2a0e20f3c9c41d7b87e3dd0a3",
            "hash": "d71f6b22925c269847d9a651ec1be309f5edc054c8d0c1b1f300ac30f2684c04",
            "actor": null,
            "seal": null
        }
    ]
}