{
    "tender_id": 2817564,
    "check": {
        "ok": true,
        "versions": 1,
        "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": "2026-10-24T13:58:39Z",
            "content": "{\"cpv\": \"71000000\", \"url\": \"https://ted.europa.eu/pl/notice/-/detail/731860-2026\", \"buyer\": \"Helsingin kaupunki, kaupunkiympäristön toimiala\", \"title\": \"Finlandia – Usługi architektoniczne, budowlane, inżynieryjne i kontrolne – Umowa ramowa na świadczenie usług budowy i zagospodarowania przestrzennego w zakresie dróg i infrastruktury komunalnej 2027 - 2028 – część 053\", \"source\": \"ted_fin\", \"status\": \"active\", \"cpv_more\": [\"71500000\", \"71520000\"], \"location\": \"FI1B1, FIN, FI1B1, FI1B1, FI1B1, FI1B1, FI1B1, FI1B1, FIN, FIN, FIN, FIN, FIN, FIN\", \"source_id\": \"731860-2026\", \"deadline_at\": \"2026-11-12T11:00:00Z\", \"notice_type\": \"Ogłoszenie TED\", \"published_at\": \"2026-10-22T02:00:00Z\"}",
            "content_hash": "3d5beb36a25431eea4b2fbb69d9e21277f41caa784af45c3304147f86259fd79",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "1a38789306d56d3971eb34e6704ad1b2f107a725bd4740368e7c59b778660430",
            "actor": null,
            "seal": {
                "id": 1,
                "digest": "25686b149cfd327de10f8db2827c82e22b0d6a884d716cd11b36328364d6937d",
                "file": "https://tenderiq.pl/rejestr/pieczec-1.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-1.txt.ots",
                "bitcoin_block": 972985
            }
        }
    ]
}