{
    "tender_id": 4222555,
    "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": "2026-10-30T21:20:44Z",
            "content": "{\"cpv\": \"90910000\", \"url\": \"https://platformazakupowa.pl/transakcja/1393091\", \"buyer\": \"Zakład Komunalny Sp. z o.o. w Opolu\", \"title\": \"U/8/TP/2026 Utrzymanie czystości w budynkach i na terenach Zakładu Komunalnego sp. z o.o.\", \"region\": \"opolskie\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Polska\", \"source_id\": \"1393091\", \"deadline_at\": \"2026-11-10T09:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-30T21:20:48Z\", \"notice_number\": \"1393091\"}",
            "content_hash": "433165dcedcd2d9b4b646c773206e292dac4cde08dadf6864793ff2f4cefea68",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "9a03e068700678f9dc7410b475d28583b5ac3cd86c33efd85d03ef062b38430c",
            "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": "2026-10-30T21:45:30Z",
            "content": "{\"cpv\": \"90910000\", \"url\": \"https://platformazakupowa.pl/transakcja/1393091\", \"buyer\": \"Zakład Komunalny Sp. z o.o. w Opolu\", \"title\": \"U/8/TP/2026 Utrzymanie czystości w budynkach i na terenach Zakładu Komunalnego sp. z o.o.\", \"region\": \"opolskie\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Polska\", \"source_id\": \"1393091\", \"deadline_at\": \"2026-11-10T09:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-30T21:20:48Z\", \"notice_number\": \"1393091\", \"procedure_url\": \"https://platformazakupowa.pl/transakcja/1393091\"}",
            "content_hash": "35ed28648a6f4b620abd504e587d39a10dec9a8088729fc061ac630f09d81393",
            "prev_hash": "9a03e068700678f9dc7410b475d28583b5ac3cd86c33efd85d03ef062b38430c",
            "hash": "b8c15961a5764b13b52ef7aa503cde57d5e3694166d892243d7f16956c732ecc",
            "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": "2026-10-31T01:18:40Z",
            "content": "{\"cpv\": \"90910000\", \"url\": \"https://platformazakupowa.pl/transakcja/1393091\", \"buyer\": \"Zakład Komunalny Sp. z o.o. w Opolu\", \"title\": \"U/8/TP/2026 Utrzymanie czystości w budynkach i na terenach Zakładu Komunalnego sp. z o.o.\", \"region\": \"opolskie\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Polska\", \"source_id\": \"1393091\", \"deadline_at\": \"2026-11-10T09:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-30T09:50:00Z\", \"notice_number\": \"1393091\", \"procedure_url\": \"https://platformazakupowa.pl/transakcja/1393091\"}",
            "content_hash": "055a46214fd41e596a65739d43e232aa684ff786ce96f582b79eced69225ac08",
            "prev_hash": "b8c15961a5764b13b52ef7aa503cde57d5e3694166d892243d7f16956c732ecc",
            "hash": "aff939eaf970e07a187914051908f9ee9da4d9da960055484db6dfdec42900b9",
            "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
            }
        }
    ]
}