{
    "tender_id": 5527541,
    "check": {
        "ok": true,
        "versions": 5,
        "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": "2026-11-06T04:13:05Z",
            "content": "{\"url\": \"https://oneplace.marketplanet.pl/zapytania-ofertowe-przetargi/-/rfp/view/3877738/nafta-antykorozyjna\", \"buyer\": \"Polski Tabor Szynowy - Wagon spółka z ograniczoną odpowiedzialnością\", \"title\": \"Nafta antykorozyjna\", \"source\": \"oneplace_marketplanet\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"3877738\", \"deadline_at\": \"2026-11-12T07:00:00Z\", \"notice_type\": \"Zapytanie ofertowe\", \"published_at\": \"2026-11-06T04:13:05Z\"}",
            "content_hash": "2f553247194a5d260e70af0b6609db675a91b5a2dbf5e8e66dbc93a73b48e019",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "4f50e1454fd63705f4c881c64a068e0ca1dfa0ad7e98d194522bf609499b14e4",
            "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
            }
        },
        {
            "version": 2,
            "recorded_at": "2026-11-06T04:45:56Z",
            "content": "{\"url\": \"https://oneplace.marketplanet.pl/zapytania-ofertowe-przetargi/-/rfp/view/3877738/nafta-antykorozyjna\", \"buyer\": \"Polski Tabor Szynowy - Wagon spółka z ograniczoną odpowiedzialnością\", \"title\": \"Nafta antykorozyjna\", \"source\": \"oneplace_marketplanet\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"3877738\", \"deadline_at\": \"2026-11-12T07:00:00Z\", \"notice_type\": \"Zapytanie ofertowe\", \"published_at\": \"2026-11-06T04:13:05Z\", \"procedure_url\": \"https://polskitabor.logintrade.net/portal,szczegolyZapytaniaOfertowe,8041cf45cc5b9c92fc184bb675d6429a.html\"}",
            "content_hash": "7df02391ceeeacc85a79161cb1925b178ef0ceedad0815df6ba42688df7f46bf",
            "prev_hash": "4f50e1454fd63705f4c881c64a068e0ca1dfa0ad7e98d194522bf609499b14e4",
            "hash": "f9210d1487721aec37678c67b5cd08a25143414c3588ebed1f8fae6b72943669",
            "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
            }
        },
        {
            "version": 3,
            "recorded_at": "2026-11-08T16:18:16Z",
            "content": "{\"cpv\": \"09131100\", \"url\": \"https://oneplace.marketplanet.pl/zapytania-ofertowe-przetargi/-/rfp/view/3877738/nafta-antykorozyjna\", \"buyer\": \"Polski Tabor Szynowy - Wagon spółka z ograniczoną odpowiedzialnością\", \"title\": \"Nafta antykorozyjna\", \"source\": \"oneplace_marketplanet\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"3877738\", \"deadline_at\": \"2026-11-12T07:00:00Z\", \"notice_type\": \"Zapytanie ofertowe\", \"published_at\": \"2026-11-06T04:13:05Z\", \"procedure_url\": \"https://polskitabor.logintrade.net/portal,szczegolyZapytaniaOfertowe,8041cf45cc5b9c92fc184bb675d6429a.html\"}",
            "content_hash": "4ca39cc16fa4ac0907f5b7cc3b1a24fa89b0f93e463d085d6506e00b56ba0c7e",
            "prev_hash": "f9210d1487721aec37678c67b5cd08a25143414c3588ebed1f8fae6b72943669",
            "hash": "21aae3e269943e162c0d4323e9b57861e27ce778a9caf1bd3ef0698a3e5bf661",
            "actor": null,
            "seal": {
                "id": 16,
                "digest": "72f8a05824ed8e52a6b46652732fcf18b4e959a25ba079607d2201da248317e1",
                "file": "https://tenderiq.pl/rejestr/pieczec-16.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-16.txt.ots",
                "bitcoin_block": 975121
            }
        },
        {
            "version": 4,
            "recorded_at": "2026-11-10T15:38:53Z",
            "content": "{\"cpv\": \"09131100\", \"url\": \"https://oneplace.marketplanet.pl/zapytania-ofertowe-przetargi/-/rfp/view/3877738/nafta-antykorozyjna\", \"buyer\": \"Polski Tabor Szynowy - Wagon spółka z ograniczoną odpowiedzialnością\", \"title\": \"Nafta antykorozyjna\", \"source\": \"oneplace_marketplanet\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"3877738\", \"deadline_at\": \"2026-11-12T07:00:00Z\", \"notice_type\": \"Zapytanie ofertowe\", \"published_at\": \"2026-11-06T04:13:05Z\", \"procedure_url\": \"https://oneplace.marketplanet.pl/zapytania-ofertowe-przetargi/-/rfp/view/3877738/nafta-antykorozyjna\"}",
            "content_hash": "956e819a01f73c710b089696363135008aa3463014591fc1557a2c6105f2b571",
            "prev_hash": "21aae3e269943e162c0d4323e9b57861e27ce778a9caf1bd3ef0698a3e5bf661",
            "hash": "081372f7ca754b1f7c1904bffab1eeb77caa13dab5bd712161564c1a80804e1b",
            "actor": null,
            "seal": {
                "id": 18,
                "digest": "adeec00ed6b673509a2a075e675623159dccab6a142d1ac62c122cfe1d16794c",
                "file": "https://tenderiq.pl/rejestr/pieczec-18.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-18.txt.ots",
                "bitcoin_block": 975359
            }
        },
        {
            "version": 5,
            "recorded_at": "2026-11-10T19:41:34Z",
            "content": "{\"cpv\": \"09131100\", \"url\": \"https://oneplace.marketplanet.pl/zapytania-ofertowe-przetargi/-/rfp/view/3877738/nafta-antykorozyjna\", \"buyer\": \"Polski Tabor Szynowy - Wagon spółka z ograniczoną odpowiedzialnością\", \"title\": \"Nafta antykorozyjna\", \"source\": \"oneplace_marketplanet\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"3877738\", \"deadline_at\": \"2026-11-12T07:00:00Z\", \"notice_type\": \"Zapytanie ofertowe\", \"published_at\": \"2026-11-06T04:13:05Z\", \"procedure_url\": \"https://polskitabor.logintrade.net/portal,szczegolyZapytaniaOfertowe,8041cf45cc5b9c92fc184bb675d6429a.html\"}",
            "content_hash": "4ca39cc16fa4ac0907f5b7cc3b1a24fa89b0f93e463d085d6506e00b56ba0c7e",
            "prev_hash": "081372f7ca754b1f7c1904bffab1eeb77caa13dab5bd712161564c1a80804e1b",
            "hash": "171bb92d71f5757632cb55fd7905da5c0d3d5d528da840c7ff75939276afd7ac",
            "actor": null,
            "seal": {
                "id": 18,
                "digest": "adeec00ed6b673509a2a075e675623159dccab6a142d1ac62c122cfe1d16794c",
                "file": "https://tenderiq.pl/rejestr/pieczec-18.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-18.txt.ots",
                "bitcoin_block": 975359
            }
        }
    ]
}