{
    "tender_id": 3756844,
    "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": "2026-10-28T11:30:19Z",
            "content": "{\"cpv\": \"72260000\", \"url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/535499/dostawa-i-wdrozenie-kompletnego-rozwiazania-do-obslugi-zgloszen-serwisowych\", \"buyer\": \"OŚRODEK PRZETWARZANIA INFORMACJI-PAŃSTWOWY INSTYTUT BADAWCZY\", \"title\": \"Dostawa i wdrożenie kompletnego rozwiązania do obsługi zgłoszeń serwisowych\", \"region\": \"mazowieckie\", \"source\": \"eb2b_public\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"MAZOWIECKIE\", \"source_id\": \"535499\", \"deadline_at\": \"2026-11-12T09:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-28T08:30:00Z\"}",
            "content_hash": "87c0176c6ec00a1e07121f73b97b1c014dd76956243b8bf46b6da2500083224e",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "da2023eed416676802b2eab895b43adc277939e899c584f22b380f8dd7036501",
            "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": "2026-10-28T11:45:31Z",
            "content": "{\"cpv\": \"72260000\", \"url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/535499/dostawa-i-wdrozenie-kompletnego-rozwiazania-do-obslugi-zgloszen-serwisowych\", \"buyer\": \"OŚRODEK PRZETWARZANIA INFORMACJI-PAŃSTWOWY INSTYTUT BADAWCZY\", \"title\": \"Dostawa i wdrożenie kompletnego rozwiązania do obsługi zgłoszeń serwisowych\", \"region\": \"mazowieckie\", \"source\": \"eb2b_public\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"MAZOWIECKIE\", \"source_id\": \"535499\", \"deadline_at\": \"2026-11-12T09:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-28T08:30:00Z\", \"procedure_url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/535499/dostawa-i-wdrozenie-kompletnego-rozwiazania-do-obslugi-zgloszen-serwisowych\"}",
            "content_hash": "cad2294d7761a009499943b31c0f84bb68b9d636163aea06dc707ad198b8631a",
            "prev_hash": "da2023eed416676802b2eab895b43adc277939e899c584f22b380f8dd7036501",
            "hash": "3c75c05abf16bb378c6fefe9ccec9b2abf3b808440f0d4deaf3b91abc565e3b1",
            "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
            }
        }
    ]
}