{
    "tender_id": 4021486,
    "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": "2026-10-29T19:36:35Z",
            "content": "{\"cpv\": \"90512000\", \"url\": \"https://platformazakupowa.pl/transakcja/1397620\", \"buyer\": \"Urząd Miejski Koronowo\", \"title\": \"ZP.271.1.41.2026 Przetransportowanie i zagospodarowanie odpadów zebranych selektywnie w 2027 roku – 9 części.\", \"region\": \"kujawsko-pomorskie\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Polska\", \"source_id\": \"1397620\", \"deadline_at\": \"2026-12-01T08:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-29T19:36:36Z\", \"notice_number\": \"1397620\"}",
            "content_hash": "c23f8b237d980146f0fbf33dcfd61f25b8bb72cc3fedcb07fdd04c69dde550f4",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "d9614f36d7daeaaa59fd4cad144d4daa898ca23e7211dc4e0f7149d503870197",
            "actor": null,
            "seal": {
                "id": 6,
                "digest": "e733200881d78faed3c108fa90cea332062fa40f3af23fcfd3f901e311d96e33",
                "file": "https://tenderiq.pl/rejestr/pieczec-6.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-6.txt.ots",
                "bitcoin_block": 973754
            }
        },
        {
            "version": 2,
            "recorded_at": "2026-10-29T19:45:59Z",
            "content": "{\"cpv\": \"90512000\", \"url\": \"https://platformazakupowa.pl/transakcja/1397620\", \"buyer\": \"Urząd Miejski Koronowo\", \"title\": \"ZP.271.1.41.2026 Przetransportowanie i zagospodarowanie odpadów zebranych selektywnie w 2027 roku – 9 części.\", \"region\": \"kujawsko-pomorskie\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Polska\", \"source_id\": \"1397620\", \"deadline_at\": \"2026-12-01T08:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-29T19:36:36Z\", \"notice_number\": \"1397620\", \"procedure_url\": \"https://platformazakupowa.pl/transakcja/1397620\"}",
            "content_hash": "f45c05fca7fecbb563245b3fb9293ee9432ef7983d0250601e889f0df2d90924",
            "prev_hash": "d9614f36d7daeaaa59fd4cad144d4daa898ca23e7211dc4e0f7149d503870197",
            "hash": "9ab170fc4f857774d69957926cc458a63a4fbd831ae02acf8961a7177e9c7a7a",
            "actor": null,
            "seal": {
                "id": 6,
                "digest": "e733200881d78faed3c108fa90cea332062fa40f3af23fcfd3f901e311d96e33",
                "file": "https://tenderiq.pl/rejestr/pieczec-6.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-6.txt.ots",
                "bitcoin_block": 973754
            }
        },
        {
            "version": 3,
            "recorded_at": "2026-10-30T03:29:44Z",
            "content": "{\"cpv\": \"90512000\", \"url\": \"https://platformazakupowa.pl/transakcja/1397620\", \"buyer\": \"Urząd Miejski Koronowo\", \"title\": \"ZP.271.1.41.2026 Przetransportowanie i zagospodarowanie odpadów zebranych selektywnie w 2027 roku – 9 części.\", \"region\": \"kujawsko-pomorskie\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Polska\", \"source_id\": \"1397620\", \"deadline_at\": \"2026-12-01T08:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-28T23:00:00Z\", \"notice_number\": \"1397620\", \"procedure_url\": \"https://platformazakupowa.pl/transakcja/1397620\"}",
            "content_hash": "9be85669385d17bc2a6fb96e8c586a685ae22758bc9a2c08086a46aa7a7ae8c6",
            "prev_hash": "9ab170fc4f857774d69957926cc458a63a4fbd831ae02acf8961a7177e9c7a7a",
            "hash": "20166158ec62350cd9f1c0ae704c635ec724315360a6334e7dc615fc50b7b924",
            "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
            }
        }
    ]
}