{
    "tender_id": 3809877,
    "check": {
        "ok": true,
        "versions": 4,
        "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": "2026-10-28T16:02:07Z",
            "content": "{\"cpv\": \"44421721\", \"url\": \"https://oneplace.marketplanet.pl/zapytania-ofertowe-przetargi/-/rfp/view/3858615/zakup-betonu-b30-zbrojonego-na-potrzeby-mpk-we-wroclawiu\", \"buyer\": \"Miejskie Przedsiębiorstwo Komunikacyjne sp. z o.o. we Wrocławiu\", \"title\": \"Zakup betonu B30 zbrojonego na potrzeby MPK we Wrocławiu\", \"region\": \"dolnoslaskie\", \"source\": \"oneplace_marketplanet\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"3858615\", \"deadline_at\": \"2026-11-02T11:00:00Z\", \"notice_type\": \"Zapytanie ofertowe\", \"published_at\": \"2026-10-28T16:02:08Z\"}",
            "content_hash": "1673963f9325ef1c8a9836fdb8876a29eb9c673da05f2dfdad57f768f15b2f9d",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "573c22d8fcd330e686f5a559e2ee841fcb974892fbb05023a7291b323b9dd40c",
            "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": "2026-10-28T19:32:12Z",
            "content": "{\"cpv\": \"44421721\", \"url\": \"https://oneplace.marketplanet.pl/zapytania-ofertowe-przetargi/-/rfp/view/3858615/zakup-betonu-b30-zbrojonego-na-potrzeby-mpk-we-wroclawiu\", \"buyer\": \"Miejskie Przedsiębiorstwo Komunikacyjne sp. z o.o. we Wrocławiu\", \"title\": \"Zakup betonu B30 zbrojonego na potrzeby MPK we Wrocławiu\", \"region\": \"dolnoslaskie\", \"source\": \"oneplace_marketplanet\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"3858615\", \"deadline_at\": \"2026-11-02T11:00:00Z\", \"notice_type\": \"Zapytanie ofertowe\", \"published_at\": \"2026-10-28T16:02:08Z\", \"procedure_url\": \"https://oneplace.marketplanet.pl/zapytania-ofertowe-przetargi/-/rfp/view/3857267/wykonanie-nawierzchni-z-betonu-asfaltowego\"}",
            "content_hash": "cdb895b80ed066d25186d8aadbd169c2212dc1093ed96915713a3200eff0acac",
            "prev_hash": "573c22d8fcd330e686f5a559e2ee841fcb974892fbb05023a7291b323b9dd40c",
            "hash": "2e34f5570eb696b5222345237ea945401d6a8451d766c6018d0b725e903decc3",
            "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": "2026-10-28T22:45:29Z",
            "content": "{\"cpv\": \"44421721\", \"url\": \"https://oneplace.marketplanet.pl/zapytania-ofertowe-przetargi/-/rfp/view/3858615/zakup-betonu-b30-zbrojonego-na-potrzeby-mpk-we-wroclawiu\", \"buyer\": \"Miejskie Przedsiębiorstwo Komunikacyjne sp. z o.o. we Wrocławiu\", \"title\": \"Zakup betonu B30 zbrojonego na potrzeby MPK we Wrocławiu\", \"region\": \"dolnoslaskie\", \"source\": \"oneplace_marketplanet\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"3858615\", \"deadline_at\": \"2026-11-02T11:00:00Z\", \"notice_type\": \"Zapytanie ofertowe\", \"published_at\": \"2026-10-28T16:02:08Z\", \"procedure_url\": \"https://platformazakupowa.pl/transakcja/1399975\"}",
            "content_hash": "096c03891bbe429e2ec84c2ca1dc64b5cea4ad06b1f5f7279ee9e9db9b3671d5",
            "prev_hash": "2e34f5570eb696b5222345237ea945401d6a8451d766c6018d0b725e903decc3",
            "hash": "4d34421cd0ed585db9ef9a3624c0cb222fe3f3578f47435d55a76872c4225eac",
            "actor": null,
            "seal": {
                "id": 6,
                "digest": "e733200881d78faed3c108fa90cea332062fa40f3af23fcfd3f901e311d96e33",
                "file": "https://tenderiq.pl/rejestr/pieczec-6.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-6.txt.ots",
                "bitcoin_block": 973754
            }
        },
        {
            "version": 4,
            "recorded_at": "2026-10-29T05:45:38Z",
            "content": "{\"cpv\": \"44421721\", \"url\": \"https://oneplace.marketplanet.pl/zapytania-ofertowe-przetargi/-/rfp/view/3858615/zakup-betonu-b30-zbrojonego-na-potrzeby-mpk-we-wroclawiu\", \"buyer\": \"Miejskie Przedsiębiorstwo Komunikacyjne sp. z o.o. we Wrocławiu\", \"title\": \"Zakup betonu B30 zbrojonego na potrzeby MPK we Wrocławiu\", \"region\": \"dolnoslaskie\", \"source\": \"oneplace_marketplanet\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"3858615\", \"deadline_at\": \"2026-11-02T11:00:00Z\", \"notice_type\": \"Zapytanie ofertowe\", \"published_at\": \"2026-10-28T16:02:08Z\", \"procedure_url\": \"https://oneplace.marketplanet.pl/zapytania-ofertowe-przetargi/-/rfp/view/3857267/wykonanie-nawierzchni-z-betonu-asfaltowego\"}",
            "content_hash": "cdb895b80ed066d25186d8aadbd169c2212dc1093ed96915713a3200eff0acac",
            "prev_hash": "4d34421cd0ed585db9ef9a3624c0cb222fe3f3578f47435d55a76872c4225eac",
            "hash": "4d459db4028d316ff772b1ba2cb5206c7a99019b7b34765112eabc79c787f902",
            "actor": null,
            "seal": {
                "id": 6,
                "digest": "e733200881d78faed3c108fa90cea332062fa40f3af23fcfd3f901e311d96e33",
                "file": "https://tenderiq.pl/rejestr/pieczec-6.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-6.txt.ots",
                "bitcoin_block": 973754
            }
        }
    ]
}