{
    "tender_id": 4222626,
    "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": "2026-10-30T21:21:11Z",
            "content": "{\"cpv\": \"45233140\", \"url\": \"https://platformazakupowa.pl/transakcja/1401540\", \"buyer\": \"Miejski Zarząd Ulic i Mostów w Katowicach\", \"title\": \"54/X/2026/WP Przebudowa ul. Okrzei w Katowicach\", \"region\": \"slaskie\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Polska\", \"source_id\": \"1401540\", \"deadline_at\": \"2026-11-16T08:55:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-30T21:21:12Z\", \"notice_number\": \"1401540\"}",
            "content_hash": "8dcda3937f53d7cc0cec38c4409d216a7d968300f1b30b5bcb2a6211a470da9e",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "d27d6212af6e8b9f0773b25c30d0e221872bff893cf50fbec76769c7bfab05cd",
            "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\": \"45233140\", \"url\": \"https://platformazakupowa.pl/transakcja/1401540\", \"buyer\": \"Miejski Zarząd Ulic i Mostów w Katowicach\", \"title\": \"54/X/2026/WP Przebudowa ul. Okrzei w Katowicach\", \"region\": \"slaskie\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Polska\", \"source_id\": \"1401540\", \"deadline_at\": \"2026-11-16T08:55:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-30T21:21:12Z\", \"notice_number\": \"1401540\", \"procedure_url\": \"https://platformazakupowa.pl/transakcja/1401540\"}",
            "content_hash": "0e7e07029a24ebd841e4d0b880301c34dd2233c91482cc1b59982429404ff9b0",
            "prev_hash": "d27d6212af6e8b9f0773b25c30d0e221872bff893cf50fbec76769c7bfab05cd",
            "hash": "70f63c2803cf4ffc673f995f1637e59a75557fcf8cff59a1e8541d173eae4387",
            "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": "2026-10-31T01:26:04Z",
            "content": "{\"cpv\": \"45000000\", \"url\": \"https://platformazakupowa.pl/transakcja/1401540\", \"buyer\": \"Miejski Zarząd Ulic i Mostów w Katowicach\", \"title\": \"54/X/2026/WP Przebudowa ul. Okrzei w Katowicach\", \"region\": \"slaskie\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [\"45233000\"], \"location\": \"Polska\", \"source_id\": \"1401540\", \"deadline_at\": \"2026-11-16T08:55:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-30T12:35:00Z\", \"notice_number\": \"1401540\", \"procedure_url\": \"https://platformazakupowa.pl/transakcja/1401540\"}",
            "content_hash": "34f8ff2c0f21da6a4f74686eaeec73bcac5626a517577029caaa44bc3e843f4a",
            "prev_hash": "70f63c2803cf4ffc673f995f1637e59a75557fcf8cff59a1e8541d173eae4387",
            "hash": "011321ee7d9f9209a2389654257fa055d5507f746fccd550df2bf5c30d285468",
            "actor": null,
            "seal": null
        }
    ]
}