{
    "tender_id": 7157742,
    "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": "2026-11-13T20:20:40Z",
            "content": "{\"cpv\": \"33696500\", \"url\": \"https://zwiklodz.logintrade.net/portal,szczegolyZapytaniaOfertowe,a17237437ec2886361cb5d1ed0e8e9a1.html\", \"buyer\": \"Zakład Wodociągów i Kanalizacji sp. z o. o.\", \"title\": \"Test kuwetowy\", \"region\": \"lodzkie\", \"source\": \"logintrade_central\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"łódzkie\", \"source_id\": \"zwiklodz-a17237437ec2886361cb5d1ed0e8e9a1\", \"deadline_at\": \"2026-11-18T11:00:00Z\", \"notice_type\": \"Zapytanie ofertowe\", \"published_at\": \"2026-11-13T10:14:00Z\"}",
            "content_hash": "098c243dd0d3d0c9b9e92056667b56c303f6a4d341a5ad59eba27d47df3e1706",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "007dfcad2f107b9737aefc9a4728d157b40cf4fa1085e8cc53a25cae29bdea5f",
            "actor": null,
            "seal": {
                "id": 21,
                "digest": "9f5cc628e20cec4e7a4adf4979e6b8d5416f11dcd193f37905493253afb6d07f",
                "file": "https://tenderiq.pl/rejestr/pieczec-21.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-21.txt.ots",
                "bitcoin_block": 975729
            }
        },
        {
            "version": 2,
            "recorded_at": "2026-11-14T00:29:32Z",
            "content": "{\"cpv\": \"33696500\", \"url\": \"https://zwiklodz.logintrade.net/portal,szczegolyZapytaniaOfertowe,a17237437ec2886361cb5d1ed0e8e9a1.html\", \"buyer\": \"Zakład Wodociągów i Kanalizacji sp. z o. o\", \"title\": \"Test kuwetowy\", \"region\": \"lodzkie\", \"source\": \"logintrade_central\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"zwiklodz-a17237437ec2886361cb5d1ed0e8e9a1\", \"deadline_at\": \"2026-11-18T11:00:00Z\", \"notice_type\": \"Zapytanie ofertowe\", \"published_at\": \"2026-11-13T12:20:00Z\"}",
            "content_hash": "94c5ebca85aee0124d7a434cbcac4f447851c0df85a733e802fb81f735ac304c",
            "prev_hash": "007dfcad2f107b9737aefc9a4728d157b40cf4fa1085e8cc53a25cae29bdea5f",
            "hash": "ac6584e5213a36aa87684cd0b48e99096ce26f024fd7439e2818e6822791f760",
            "actor": null,
            "seal": null
        },
        {
            "version": 3,
            "recorded_at": "2026-11-14T06:45:53Z",
            "content": "{\"cpv\": \"33696500\", \"url\": \"https://zwiklodz.logintrade.net/portal,szczegolyZapytaniaOfertowe,a17237437ec2886361cb5d1ed0e8e9a1.html\", \"buyer\": \"Zakład Wodociągów i Kanalizacji sp. z o. o\", \"title\": \"Test kuwetowy\", \"region\": \"lodzkie\", \"source\": \"logintrade_central\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"zwiklodz-a17237437ec2886361cb5d1ed0e8e9a1\", \"deadline_at\": \"2026-11-18T11:00:00Z\", \"notice_type\": \"Zapytanie ofertowe\", \"published_at\": \"2026-11-13T12:20:00Z\", \"procedure_url\": \"https://zwiklodz.logintrade.net/portal,szczegolyZapytaniaOfertowe,a17237437ec2886361cb5d1ed0e8e9a1.html\"}",
            "content_hash": "e2d07651b16f4b2747254e83bebff0e790dd0270e0e64ba9d4ff6b9b1a35f88c",
            "prev_hash": "ac6584e5213a36aa87684cd0b48e99096ce26f024fd7439e2818e6822791f760",
            "hash": "8bfd9dc874d0e531c9014dcc7039b2edd4ac44e0cbe8715139ee00e2d0b25288",
            "actor": null,
            "seal": null
        }
    ]
}