{
    "tender_id": 3828434,
    "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": "2026-10-28T21:31:08Z",
            "content": "{\"cpv\": \"38500000\", \"url\": \"https://platformazakupowa.pl/transakcja/1399422\", \"buyer\": \"Politechnika Warszawska\", \"title\": \"CEZAMAT/ZP29/2026 Dostawa aparatury pilotażowej, modułowej, wąskowstęgowej linii \\\"roll-to-roll\\\" dla elektroniki drukowanej\", \"region\": \"mazowieckie\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Polska\", \"source_id\": \"1399422\", \"deadline_at\": \"2026-11-27T10:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-28T21:31:08Z\", \"notice_number\": \"1399422\"}",
            "content_hash": "ce66dfc358d1806088a2afdb7d1a58ed7fbbf9197aef640aa7ac92567b6bd4d9",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "f833e6aaf6d5e242c0506f8db691b30e89649eae864f3d91e0c17ef25cb27616",
            "actor": null,
            "seal": {
                "id": 5,
                "digest": "0659ce1e2aadd7f69ed1ff4603a4290c070eaa14bbeed28a3c9a7cc2127acae9",
                "file": "https://tenderiq.pl/rejestr/pieczec-5.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-5.txt.ots",
                "bitcoin_block": 973609
            }
        },
        {
            "version": 2,
            "recorded_at": "2026-10-28T21:45:31Z",
            "content": "{\"cpv\": \"38500000\", \"url\": \"https://platformazakupowa.pl/transakcja/1399422\", \"buyer\": \"Politechnika Warszawska\", \"title\": \"CEZAMAT/ZP29/2026 Dostawa aparatury pilotażowej, modułowej, wąskowstęgowej linii \\\"roll-to-roll\\\" dla elektroniki drukowanej\", \"region\": \"mazowieckie\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Polska\", \"source_id\": \"1399422\", \"deadline_at\": \"2026-11-27T10:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-28T21:31:08Z\", \"notice_number\": \"1399422\", \"procedure_url\": \"https://platformazakupowa.pl/transakcja/1399422\"}",
            "content_hash": "b7386c783de1d0dd66d3677566d3e2fdaa4c268186646753daa7727d699a5566",
            "prev_hash": "f833e6aaf6d5e242c0506f8db691b30e89649eae864f3d91e0c17ef25cb27616",
            "hash": "fc91a322584e3889c6ce3fc83193b2233a0cc119237c6d53d43e55267ac835fa",
            "actor": null,
            "seal": {
                "id": 5,
                "digest": "0659ce1e2aadd7f69ed1ff4603a4290c070eaa14bbeed28a3c9a7cc2127acae9",
                "file": "https://tenderiq.pl/rejestr/pieczec-5.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-5.txt.ots",
                "bitcoin_block": 973609
            }
        },
        {
            "version": 3,
            "recorded_at": "2026-10-29T01:58:24Z",
            "content": "{\"cpv\": \"38500000\", \"url\": \"https://platformazakupowa.pl/transakcja/1399422\", \"buyer\": \"Politechnika Warszawska\", \"title\": \"CEZAMAT/ZP29/2026 Dostawa aparatury pilotażowej, modułowej, wąskowstęgowej linii \\\"roll-to-roll\\\" dla elektroniki drukowanej\", \"region\": \"mazowieckie\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Polska\", \"source_id\": \"1399422\", \"deadline_at\": \"2026-11-27T10:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-28T08:27:00Z\", \"notice_number\": \"1399422\", \"procedure_url\": \"https://platformazakupowa.pl/transakcja/1399422\"}",
            "content_hash": "bdb963f629203e6bb260df13c6823ca89e5e1d3829e64fae8ae88fbb71212b7e",
            "prev_hash": "fc91a322584e3889c6ce3fc83193b2233a0cc119237c6d53d43e55267ac835fa",
            "hash": "eb30bb93b2dcbdabca3af755ff03eeaf5b77dd5d2fb606f887b27a96cdb9a9cf",
            "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
            }
        }
    ]
}