{
    "tender_id": 4222498,
    "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": "2026-10-30T21:20:10Z",
            "content": "{\"cpv\": \"79710000\", \"url\": \"https://platformazakupowa.pl/transakcja/1393100\", \"buyer\": \"Narodowe Centrum Kultury\", \"title\": \"SZP.26.25.2026 Świadczenie usługi ochrony osób i mienia na rzecz Narodowego Centrum Kultury oraz instalacja i obsługa systemów antynapadowych\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Polska\", \"source_id\": \"1393100\", \"deadline_at\": \"2026-11-09T09:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-30T21:20:18Z\", \"notice_number\": \"1393100\"}",
            "content_hash": "31886bb0d7d06c6ecf085b16921e30748af388eebd29f7d3e41e15a64f1ecc90",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "863b0d4dbfdc28d24cdcb4d4feaa46df1de19745e9f7a03af5f1173ece52216f",
            "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": "2026-10-30T21:45:31Z",
            "content": "{\"cpv\": \"79710000\", \"url\": \"https://platformazakupowa.pl/transakcja/1393100\", \"buyer\": \"Narodowe Centrum Kultury\", \"title\": \"SZP.26.25.2026 Świadczenie usługi ochrony osób i mienia na rzecz Narodowego Centrum Kultury oraz instalacja i obsługa systemów antynapadowych\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Polska\", \"source_id\": \"1393100\", \"deadline_at\": \"2026-11-09T09:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-30T21:20:18Z\", \"notice_number\": \"1393100\", \"procedure_url\": \"https://platformazakupowa.pl/transakcja/1393100\"}",
            "content_hash": "56bf5b68ea223f79cf60e49eebcf7420b3b11e09bae5b0bdc7166003c4feddcf",
            "prev_hash": "863b0d4dbfdc28d24cdcb4d4feaa46df1de19745e9f7a03af5f1173ece52216f",
            "hash": "132a321006594ec27fd774574399f50bbae21ae46a0e3ea8df552a07eb3f075c",
            "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": "2026-10-31T01:12:47Z",
            "content": "{\"cpv\": \"79710000\", \"url\": \"https://platformazakupowa.pl/transakcja/1393100\", \"buyer\": \"Narodowe Centrum Kultury\", \"title\": \"SZP.26.25.2026 Świadczenie usługi ochrony osób i mienia na rzecz Narodowego Centrum Kultury oraz instalacja i obsługa systemów antynapadowych\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Polska\", \"source_id\": \"1393100\", \"deadline_at\": \"2026-11-09T09:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-30T09:32:00Z\", \"notice_number\": \"1393100\", \"procedure_url\": \"https://platformazakupowa.pl/transakcja/1393100\"}",
            "content_hash": "264c30addead35dcda8abe5c647c660a4afa9ca2127c5938cdb88916337a8ccc",
            "prev_hash": "132a321006594ec27fd774574399f50bbae21ae46a0e3ea8df552a07eb3f075c",
            "hash": "27d6a431f5087ae2f65defd4756a72d5a7e960d798996f74fd3991fc0873e56b",
            "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
            }
        }
    ]
}