{
    "tender_id": 3368135,
    "check": {
        "ok": true,
        "versions": 2,
        "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": "2026-10-26T09:55:18Z",
            "content": "{\"cpv\": \"38500000\", \"url\": \"https://ted.europa.eu/pl/notice/-/detail/740145-2026\", \"buyer\": \"Tallinna Tehnikaülikool\", \"title\": \"Estonia – Aparatura kontrolna i badawcza – Hüperspektraalne mõõtesüsteem\", \"source\": \"ted_est\", \"status\": \"active\", \"cpv_more\": [\"38424000\"], \"location\": \"EE001, EST, EE001, EST\", \"source_id\": \"740145-2026\", \"deadline_at\": \"2026-11-23T09:00:00Z\", \"notice_type\": \"Ogłoszenie TED\", \"published_at\": \"2026-10-26T01:00:00Z\"}",
            "content_hash": "01c15299f2241e6e31879b82ecab08471244166f6d2662fea2151770a3f1dafc",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "cec65625ac8e9592b88650a63c1ea8e1b6bab1ba43630a1c4c90d107bb154677",
            "actor": null,
            "seal": {
                "id": 3,
                "digest": "1119fd2ade60dc88ac794742ff488b9486e8a488f9d77cc6d6a9444474dc1c77",
                "file": "https://tenderiq.pl/rejestr/pieczec-3.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-3.txt.ots",
                "bitcoin_block": 973309
            }
        },
        {
            "version": 2,
            "recorded_at": "2026-10-26T23:17:48Z",
            "content": "{\"cpv\": \"38500000\", \"url\": \"https://ted.europa.eu/pl/notice/-/detail/740145-2026\", \"buyer\": \"Tallinna Tehnikaülikool\", \"title\": \"Estonia – Aparatura kontrolna i badawcza – Hiperwidoczny system pomiarowy\", \"source\": \"ted_est\", \"status\": \"active\", \"cpv_more\": [\"38424000\"], \"location\": \"EE001, EST, EE001, EST\", \"source_id\": \"740145-2026\", \"deadline_at\": \"2026-11-23T09:00:00Z\", \"notice_type\": \"Ogłoszenie TED\", \"published_at\": \"2026-10-26T01:00:00Z\"}",
            "content_hash": "a009773abc5d2dc4d56bdfec43a96670b780d476ef0e56db0d7efc063437cd71",
            "prev_hash": "cec65625ac8e9592b88650a63c1ea8e1b6bab1ba43630a1c4c90d107bb154677",
            "hash": "c1db3388ce2eac942e4f363460983cc7c189ce64b1eb3a81430a0a50bd4bd4ce",
            "actor": null,
            "seal": {
                "id": 4,
                "digest": "1a6d1144791ca08d9453bd1c8d38a6c251eb74cb6d377626fde25c11a52ccc7a",
                "file": "https://tenderiq.pl/rejestr/pieczec-4.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-4.txt.ots",
                "bitcoin_block": 973472
            }
        }
    ]
}