{
    "tender_id": 4335064,
    "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": "2026-10-31T12:11:00Z",
            "content": "{\"cpv\": \"80550000\", \"url\": \"https://www.przetargi.egospodarka.pl/20051159101_Przeprowadzenie-szkolen-z-zakresu-cyberbezpieczenstwa_2026_2.html\", \"buyer\": \"Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich\", \"title\": \"Przeprowadzenie szkoleń z zakresu cyberbezpieczeństwa\", \"region\": \"kujawsko-pomorskie\", \"source\": \"egospodarka_przetargi\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Bydgoszcz\", \"source_id\": \"20051159101\", \"deadline_at\": \"2026-11-09T22:59:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-30T00:00:00Z\"}",
            "content_hash": "76c03a91a18ab8caa411a6da03876ea1b37579de504c8e6f4fcaf6e5ede7f407",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "6608dec74fc325a4697f91932e63fe86f376496366b7a2ea0e8eeabecc1f4ac4",
            "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": 2,
            "recorded_at": "2026-10-31T12:45:31Z",
            "content": "{\"cpv\": \"80550000\", \"url\": \"https://www.przetargi.egospodarka.pl/20051159101_Przeprowadzenie-szkolen-z-zakresu-cyberbezpieczenstwa_2026_2.html\", \"buyer\": \"Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich\", \"title\": \"Przeprowadzenie szkoleń z zakresu cyberbezpieczeństwa\", \"region\": \"kujawsko-pomorskie\", \"source\": \"egospodarka_przetargi\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Bydgoszcz\", \"source_id\": \"20051159101\", \"deadline_at\": \"2026-11-09T22:59:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-30T00:00:00Z\", \"procedure_url\": \"https://platformazakupowa.pl/transakcja/1372907\"}",
            "content_hash": "00458103efd0e5fa6b0534ef5a56861b7e24ac3eb2e81f2c79a3863ea8996938",
            "prev_hash": "6608dec74fc325a4697f91932e63fe86f376496366b7a2ea0e8eeabecc1f4ac4",
            "hash": "163bbb04a652cc113b12a80079b2d62f36398c2410ef0b4feecb219f361c9c5c",
            "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
            }
        }
    ]
}