{
    "tender_id": 3756786,
    "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": "2026-10-28T11:30:13Z",
            "content": "{\"cpv\": \"42514310\", \"url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/535926/czujnik-temperatury-man-przekaznik-nr-51-25514-0001-do-sa-105-sa-108\", \"buyer\": \"KOLEJE WIELKOPOLSKIE SP. Z O.O.\", \"title\": \"Czujnik temperatury MAN (przekaźnik) nr 51.25514-0001 do SA 105, SA 108\", \"region\": \"wielkopolskie\", \"source\": \"eb2b_public\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"WIELKOPOLSKIE\", \"source_id\": \"535926\", \"deadline_at\": \"2026-11-04T12:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-28T09:00:00Z\"}",
            "content_hash": "d8b683b541d289181bcb8a6c8554127b8507f3a005b747565eb5df0885ee46ff",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "0b50faf6b7b8d1e42667764625caf285178bb8c6258b3009601cfe411ab93809",
            "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": "2026-10-29T04:45:41Z",
            "content": "{\"cpv\": \"42514310\", \"url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/535926/czujnik-temperatury-man-przekaznik-nr-51-25514-0001-do-sa-105-sa-108\", \"buyer\": \"KOLEJE WIELKOPOLSKIE SP. Z O.O.\", \"title\": \"Czujnik temperatury MAN (przekaźnik) nr 51.25514-0001 do SA 105, SA 108\", \"region\": \"wielkopolskie\", \"source\": \"eb2b_public\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"WIELKOPOLSKIE\", \"source_id\": \"535926\", \"deadline_at\": \"2026-11-04T12:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-28T09:00:00Z\", \"procedure_url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/535926/czujnik-temperatury-man-przekaznik-nr-51-25514-0001-do-sa-105-sa-108\"}",
            "content_hash": "6e6b05f63a5592e22db062c6cc10857ebafe53290b2fb0faa2e3012021cc8d30",
            "prev_hash": "0b50faf6b7b8d1e42667764625caf285178bb8c6258b3009601cfe411ab93809",
            "hash": "fd7fe91e83843ebf1020be2fce238923de38e0598034d1e37ea70da23d271ac4",
            "actor": null,
            "seal": null
        }
    ]
}