{
    "tender_id": 4120195,
    "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": "2026-10-30T10:08:47Z",
            "content": "{\"cpv\": \"42514310\", \"url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/536372/czujnik-temperatury-jsp-pt-100-do-en76-1\", \"buyer\": \"KOLEJE WIELKOPOLSKIE SP. Z O.O.\", \"title\": \"Czujnik temperatury JSP PT 100 do EN76\", \"region\": \"wielkopolskie\", \"source\": \"eb2b_public\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"WIELKOPOLSKIE\", \"source_id\": \"536372\", \"deadline_at\": \"2026-11-06T12:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-30T10:00:00Z\"}",
            "content_hash": "c6004e2ab2c263ace6af360fbc5658f795934a059e11bc4b3dc031ac9e1bed6b",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "7310bbc93b716f8da0a28d3c00065daa48b4a00b6f5c9613a8ff279cbad9c270",
            "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
            }
        },
        {
            "version": 2,
            "recorded_at": "2026-10-31T10:45:46Z",
            "content": "{\"cpv\": \"42514310\", \"url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/536372/czujnik-temperatury-jsp-pt-100-do-en76-1\", \"buyer\": \"KOLEJE WIELKOPOLSKIE SP. Z O.O.\", \"title\": \"Czujnik temperatury JSP PT 100 do EN76\", \"region\": \"wielkopolskie\", \"source\": \"eb2b_public\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"WIELKOPOLSKIE\", \"source_id\": \"536372\", \"deadline_at\": \"2026-11-06T12:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-30T10:00:00Z\", \"procedure_url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/536372/czujnik-temperatury-jsp-pt-100-do-en76-1\"}",
            "content_hash": "58bb26765ead8812527521af683adbc3db3296ecc4c771147aa4d57eeb613ce7",
            "prev_hash": "7310bbc93b716f8da0a28d3c00065daa48b4a00b6f5c9613a8ff279cbad9c270",
            "hash": "0773e59d3ad8c67b96a6b93014093b83cb705b31bac08bdd9374f1633f0bcb98",
            "actor": null,
            "seal": {
                "id": 8,
                "digest": "b9dfb65eef062a8f7633cee107df2b59fcca72ec5f093c9ceec0396cf65cd90d",
                "file": "https://tenderiq.pl/rejestr/pieczec-8.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-8.txt.ots",
                "bitcoin_block": 974039
            }
        }
    ]
}