{
    "tender_id": 3694387,
    "check": {
        "ok": true,
        "versions": 5,
        "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": "2026-10-28T00:56:22Z",
            "content": "{\"cpv\": \"48811000\", \"url\": \"https://ted.europa.eu/pl/notice/-/detail/747912-2026\", \"buyer\": \"Kasa Rolniczego Ubezpieczenia Społecznego\", \"title\": \"Polska – System poczty elektronicznej – Zakup licencji MS Office i pocztowych\", \"source\": \"ted\", \"status\": \"active\", \"cpv_more\": [\"48300000\"], \"location\": \"POL, POL, POL\", \"source_id\": \"747912-2026\", \"deadline_at\": \"2026-11-09T10:00:00Z\", \"notice_type\": \"Ogłoszenie TED\", \"published_at\": \"2026-10-28T01:00:00Z\"}",
            "content_hash": "b68c2817e9c17266a69ce71bcc6974f54ae16815f3fbc33d7657ea07cad9f234",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "4297a81f022dbd8436cb7d19048f7f6eb86f398b56461db38413df45005461c0",
            "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": "2026-10-28T12:45:35Z",
            "content": "{\"cpv\": \"48811000\", \"url\": \"https://ted.europa.eu/pl/notice/-/detail/747912-2026\", \"buyer\": \"Kasa Rolniczego Ubezpieczenia Społecznego\", \"title\": \"Polska – System poczty elektronicznej – Zakup licencji MS Office i pocztowych\", \"source\": \"ted\", \"status\": \"active\", \"cpv_more\": [\"48300000\"], \"location\": \"POL, POL, POL\", \"source_id\": \"747912-2026\", \"deadline_at\": \"2026-11-09T10:00:00Z\", \"notice_type\": \"Ogłoszenie TED\", \"published_at\": \"2026-10-28T01:00:00Z\", \"procedure_url\": \"https://ezamowienia.krus.gov.pl/open-preview-auction.html/528945/zakup-licencji-ms-office-i-pocztowych\"}",
            "content_hash": "04daf1fbefbca8101e304743a3a75f051285d15cde5dd40c73fd3393881e0d64",
            "prev_hash": "4297a81f022dbd8436cb7d19048f7f6eb86f398b56461db38413df45005461c0",
            "hash": "365eb5014070632644a521301b54b4bd9a5030136dc45c4a3dc7caf29fd010a4",
            "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": "2026-10-28T19:32:15Z",
            "content": "{\"cpv\": \"48811000\", \"url\": \"https://ted.europa.eu/pl/notice/-/detail/747912-2026\", \"buyer\": \"Kasa Rolniczego Ubezpieczenia Społecznego\", \"title\": \"Polska – System poczty elektronicznej – Zakup licencji MS Office i pocztowych\", \"source\": \"ted\", \"status\": \"active\", \"cpv_more\": [\"48300000\"], \"location\": \"POL, POL, POL\", \"source_id\": \"747912-2026\", \"deadline_at\": \"2026-11-09T10:00:00Z\", \"notice_type\": \"Ogłoszenie TED\", \"published_at\": \"2026-10-28T01:00:00Z\"}",
            "content_hash": "b68c2817e9c17266a69ce71bcc6974f54ae16815f3fbc33d7657ea07cad9f234",
            "prev_hash": "365eb5014070632644a521301b54b4bd9a5030136dc45c4a3dc7caf29fd010a4",
            "hash": "ce4b2907046805121fe6cea83b3db07228051a80e8d316dbe72f630b41cffecc",
            "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": 4,
            "recorded_at": "2026-10-28T20:45:24Z",
            "content": "{\"cpv\": \"48811000\", \"url\": \"https://ted.europa.eu/pl/notice/-/detail/747912-2026\", \"buyer\": \"Kasa Rolniczego Ubezpieczenia Społecznego\", \"title\": \"Polska – System poczty elektronicznej – Zakup licencji MS Office i pocztowych\", \"source\": \"ted\", \"status\": \"active\", \"cpv_more\": [\"48300000\"], \"location\": \"POL, POL, POL\", \"source_id\": \"747912-2026\", \"deadline_at\": \"2026-11-09T10:00:00Z\", \"notice_type\": \"Ogłoszenie TED\", \"published_at\": \"2026-10-28T01:00:00Z\", \"procedure_url\": \"https://ezamowienia.krus.gov.pl/open-preview-auction.html/528945/zakup-licencji-ms-office-i-pocztowych\"}",
            "content_hash": "04daf1fbefbca8101e304743a3a75f051285d15cde5dd40c73fd3393881e0d64",
            "prev_hash": "ce4b2907046805121fe6cea83b3db07228051a80e8d316dbe72f630b41cffecc",
            "hash": "18edaff69c8a23ce5461eccffd927fa350e5a60e055e4ec606bb51528d203fb5",
            "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": 5,
            "recorded_at": "2026-10-29T23:29:51Z",
            "content": "{\"cpv\": \"48811000\", \"url\": \"https://ted.europa.eu/pl/notice/-/detail/747912-2026\", \"buyer\": \"Kasa Rolniczego Ubezpieczenia Społecznego\", \"title\": \"Polska – System poczty elektronicznej – Zakup licencji MS Office i pocztowych\", \"source\": \"ted\", \"status\": \"active\", \"cpv_more\": [\"48300000\"], \"location\": \"POL, POL, POL\", \"source_id\": \"747912-2026\", \"deadline_at\": \"2026-11-09T10:00:00Z\", \"notice_type\": \"Ogłoszenie TED\", \"published_at\": \"2026-10-28T01:00:00Z\"}",
            "content_hash": "b68c2817e9c17266a69ce71bcc6974f54ae16815f3fbc33d7657ea07cad9f234",
            "prev_hash": "18edaff69c8a23ce5461eccffd927fa350e5a60e055e4ec606bb51528d203fb5",
            "hash": "c4926f323737960ea169941144a6284f12faa33934ab300817d99e1431d62590",
            "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
            }
        }
    ]
}