{
    "tender_id": 5384686,
    "check": {
        "ok": true,
        "versions": 3,
        "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": "2026-11-05T10:19:37Z",
            "content": "{\"cpv\": \"33141000\", \"url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/537060/zakup-materialow-przemyslowych-16\", \"buyer\": \"KOLEJE MAZOWIECKIE - KM SP. Z O.O.\", \"title\": \"Zakup materiałów przemysłowych\", \"region\": \"mazowieckie\", \"source\": \"eb2b_public\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"MAZOWIECKIE\", \"source_id\": \"537060\", \"deadline_at\": \"2026-11-10T11:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-11-05T07:00:00Z\"}",
            "content_hash": "d465d0e75482c8ca6af6fd53403df755290ed28e9f9c3fb3a5f026df80f51685",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "bccd9e6b40a3e23e9ce639db102d5ddb079218e653262686aad13428450b3c86",
            "actor": null,
            "seal": {
                "id": 13,
                "digest": "88eaa47ed54f178cca07f94ec9f0c5d48c105c008cf249a9e53ac4ca63161903",
                "file": "https://tenderiq.pl/rejestr/pieczec-13.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-13.txt.ots",
                "bitcoin_block": 974729
            }
        },
        {
            "version": 2,
            "recorded_at": "2026-11-05T10:45:44Z",
            "content": "{\"cpv\": \"33141000\", \"url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/537060/zakup-materialow-przemyslowych-16\", \"buyer\": \"KOLEJE MAZOWIECKIE - KM SP. Z O.O.\", \"title\": \"Zakup materiałów przemysłowych\", \"region\": \"mazowieckie\", \"source\": \"eb2b_public\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"MAZOWIECKIE\", \"source_id\": \"537060\", \"deadline_at\": \"2026-11-10T11:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-11-05T07:00:00Z\", \"procedure_url\": \"https://km.eb2b.com.pl/open-preview-auction.html/537060/zakup-materialow-przemyslowych-16\"}",
            "content_hash": "8c546108c719597402d73a9b30b74191147220f4366017b7935189e95a7ca24d",
            "prev_hash": "bccd9e6b40a3e23e9ce639db102d5ddb079218e653262686aad13428450b3c86",
            "hash": "29dae728aaf36f37f59e2b7b59b00fdee688a2ab519b39544a2900d63b9c73ce",
            "actor": null,
            "seal": {
                "id": 13,
                "digest": "88eaa47ed54f178cca07f94ec9f0c5d48c105c008cf249a9e53ac4ca63161903",
                "file": "https://tenderiq.pl/rejestr/pieczec-13.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-13.txt.ots",
                "bitcoin_block": 974729
            }
        },
        {
            "version": 3,
            "recorded_at": "2026-11-06T01:32:13Z",
            "content": "{\"cpv\": \"79300000\", \"url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/537060/zakup-materialow-przemyslowych-16\", \"buyer\": \"KOLEJE MAZOWIECKIE - KM SP. Z O.O.\", \"title\": \"Zakup materiałów przemysłowych\", \"region\": \"mazowieckie\", \"source\": \"eb2b_public\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"MAZOWIECKIE\", \"source_id\": \"537060\", \"deadline_at\": \"2026-11-10T11:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-11-05T07:00:00Z\", \"procedure_url\": \"https://km.eb2b.com.pl/open-preview-auction.html/537060/zakup-materialow-przemyslowych-16\"}",
            "content_hash": "fb2cd77074e11f31d539d992e1bca582f10c7233a3428f0d7f075fde6d9a984b",
            "prev_hash": "29dae728aaf36f37f59e2b7b59b00fdee688a2ab519b39544a2900d63b9c73ce",
            "hash": "ecf5e044006494983165c5abd6d9c3392f239dfc204d74d32eeef0c638778ea8",
            "actor": null,
            "seal": {
                "id": 14,
                "digest": "40311773b0ad96735478ea3fd2d0f50746aa4156eaa6f667f3f02f9a13460e6d",
                "file": "https://tenderiq.pl/rejestr/pieczec-14.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-14.txt.ots",
                "bitcoin_block": 974874
            }
        }
    ]
}