{
    "tender_id": 4781286,
    "check": {
        "ok": true,
        "versions": 10,
        "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": "2026-11-02T14:21:45Z",
            "content": "{\"cpv\": \"45111000\", \"url\": \"https://ezamowienia.gov.pl/mo-client-board/bzp/notice-details/id/08df38e7-9f85-7d37-e2d6-6b000120cbda\", \"buyer\": \"Miasto Zielonka\", \"title\": \"Modernizacja chodnika, zjazdów do nieruchomości w ul. Warmińskiej w Zielonce- I etap modernizacji drogi gminnej.\", \"region\": \"mazowieckie\", \"source\": \"ezamowienia_notices\", \"status\": \"active\", \"cpv_more\": [\"45233300\", \"45233142\", \"45233100\"], \"location\": \"Zielonka, mazowieckie\", \"buyer_nip\": \"1251334816\", \"source_id\": \"2026/BZP 00516989/01\", \"deadline_at\": \"2026-11-18T09:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-11-02T13:45:57Z\", \"notice_number\": \"2026/BZP 00516989/01\"}",
            "content_hash": "a540c19252dae7c79248ecf37798978891ef2d435eeede046f16b03e25deb196",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "5380eef3fd7c75a53c7196b9cb8adb9ab809b482f2592e242f8c9b9966a4e3f5",
            "actor": null,
            "seal": {
                "id": 10,
                "digest": "297505af1d9d820e84b46bcdd40ae11b1ffc912134eeb69a764090ac7f9838b4",
                "file": "https://tenderiq.pl/rejestr/pieczec-10.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-10.txt.ots",
                "bitcoin_block": 974314
            }
        },
        {
            "version": 2,
            "recorded_at": "2026-11-02T16:45:19Z",
            "content": "{\"cpv\": \"45111000\", \"url\": \"https://ezamowienia.gov.pl/mo-client-board/bzp/notice-details/id/08df38e7-9f85-7d37-e2d6-6b000120cbda\", \"buyer\": \"Miasto Zielonka\", \"title\": \"Modernizacja chodnika, zjazdów do nieruchomości w ul. Warmińskiej w Zielonce- I etap modernizacji drogi gminnej.\", \"region\": \"mazowieckie\", \"source\": \"ezamowienia_notices\", \"status\": \"active\", \"cpv_more\": [\"45233300\", \"45233142\", \"45233100\"], \"location\": \"Zielonka, mazowieckie\", \"buyer_nip\": \"1251334816\", \"source_id\": \"2026/BZP 00516989/01\", \"deadline_at\": \"2026-11-18T09:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-11-02T13:45:57Z\", \"notice_number\": \"2026/BZP 00516989/01\", \"procedure_url\": \"https://zielonka.ezamawiajacy.pl/pn/zielonka/demand/notice/public/241577/details\"}",
            "content_hash": "6dc9d31f6522eeac39e3dc25c1002019ae37bbc2fe7157a47bba783480d7abde",
            "prev_hash": "5380eef3fd7c75a53c7196b9cb8adb9ab809b482f2592e242f8c9b9966a4e3f5",
            "hash": "2731a5cb51ff03591d3af4216763a02d3228d9a26a0845f3b0a98a212841fd77",
            "actor": null,
            "seal": {
                "id": 10,
                "digest": "297505af1d9d820e84b46bcdd40ae11b1ffc912134eeb69a764090ac7f9838b4",
                "file": "https://tenderiq.pl/rejestr/pieczec-10.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-10.txt.ots",
                "bitcoin_block": 974314
            }
        },
        {
            "version": 3,
            "recorded_at": "2026-11-04T16:56:02Z",
            "content": "{\"cpv\": \"45233140\", \"url\": \"https://ezamowienia.gov.pl/mo-client-board/bzp/notice-details/id/08df38e7-9f85-7d37-e2d6-6b000120cbda\", \"buyer\": \"Miasto Zielonka\", \"title\": \"Modernizacja chodnika, zjazdów do nieruchomości w ul. Warmińskiej w Zielonce- I etap modernizacji drogi gminnej.\", \"region\": \"mazowieckie\", \"source\": \"ezamowienia_notices\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Zielonka, mazowieckie\", \"buyer_nip\": \"1251334816\", \"source_id\": \"2026/BZP 00516989/01\", \"deadline_at\": \"2026-11-18T09:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-11-02T13:45:57Z\", \"notice_number\": \"2026/BZP 00516989/01\", \"procedure_url\": \"https://zielonka.ezamawiajacy.pl/pn/zielonka/demand/notice/public/241577/details\"}",
            "content_hash": "f7f0883ebce7a36f3e05235610a8fb5f4a34a489ac8f28974e050ee37483566d",
            "prev_hash": "2731a5cb51ff03591d3af4216763a02d3228d9a26a0845f3b0a98a212841fd77",
            "hash": "79daa4d904c3513927d166ad6f0a7cbd05cb2cf6c0a170662a4b0642fb0b05d9",
            "actor": null,
            "seal": {
                "id": 12,
                "digest": "e23c0f5a7e440e937f514487a150dc1be40887f39a941304e364e5e94a4b77fc",
                "file": "https://tenderiq.pl/rejestr/pieczec-12.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-12.txt.ots",
                "bitcoin_block": 974604
            }
        },
        {
            "version": 4,
            "recorded_at": "2026-11-04T20:06:34Z",
            "content": "{\"cpv\": \"45111000\", \"url\": \"https://ezamowienia.gov.pl/mo-client-board/bzp/notice-details/id/08df38e7-9f85-7d37-e2d6-6b000120cbda\", \"buyer\": \"Miasto Zielonka\", \"title\": \"Modernizacja chodnika, zjazdów do nieruchomości w ul. Warmińskiej w Zielonce- I etap modernizacji drogi gminnej.\", \"region\": \"mazowieckie\", \"source\": \"ezamowienia_notices\", \"status\": \"active\", \"cpv_more\": [\"45233300\", \"45233142\", \"45233100\"], \"location\": \"Zielonka, mazowieckie\", \"buyer_nip\": \"1251334816\", \"source_id\": \"2026/BZP 00516989/01\", \"deadline_at\": \"2026-11-18T09:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-11-02T13:45:57Z\", \"notice_number\": \"2026/BZP 00516989/01\", \"procedure_url\": \"https://zielonka.ezamawiajacy.pl/pn/zielonka/demand/notice/public/241577/details\"}",
            "content_hash": "6dc9d31f6522eeac39e3dc25c1002019ae37bbc2fe7157a47bba783480d7abde",
            "prev_hash": "79daa4d904c3513927d166ad6f0a7cbd05cb2cf6c0a170662a4b0642fb0b05d9",
            "hash": "8bfcebd379b10afad00c6add3e9bf404411463914ae8925879f537f5f60f7a9c",
            "actor": null,
            "seal": {
                "id": 12,
                "digest": "e23c0f5a7e440e937f514487a150dc1be40887f39a941304e364e5e94a4b77fc",
                "file": "https://tenderiq.pl/rejestr/pieczec-12.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-12.txt.ots",
                "bitcoin_block": 974604
            }
        },
        {
            "version": 5,
            "recorded_at": "2026-11-04T22:15:36Z",
            "content": "{\"cpv\": \"45233140\", \"url\": \"https://ezamowienia.gov.pl/mo-client-board/bzp/notice-details/id/08df38e7-9f85-7d37-e2d6-6b000120cbda\", \"buyer\": \"Miasto Zielonka\", \"title\": \"Modernizacja chodnika, zjazdów do nieruchomości w ul. Warmińskiej w Zielonce- I etap modernizacji drogi gminnej.\", \"region\": \"mazowieckie\", \"source\": \"ezamowienia_notices\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Zielonka, mazowieckie\", \"buyer_nip\": \"1251334816\", \"source_id\": \"2026/BZP 00516989/01\", \"deadline_at\": \"2026-11-18T09:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-11-02T13:45:57Z\", \"notice_number\": \"2026/BZP 00516989/01\", \"procedure_url\": \"https://zielonka.ezamawiajacy.pl/pn/zielonka/demand/notice/public/241577/details\"}",
            "content_hash": "f7f0883ebce7a36f3e05235610a8fb5f4a34a489ac8f28974e050ee37483566d",
            "prev_hash": "8bfcebd379b10afad00c6add3e9bf404411463914ae8925879f537f5f60f7a9c",
            "hash": "9440de69a16e8088b8cfe9dd9ed46eebb2b2beade10669ac9958813b40a50ae1",
            "actor": null,
            "seal": {
                "id": 12,
                "digest": "e23c0f5a7e440e937f514487a150dc1be40887f39a941304e364e5e94a4b77fc",
                "file": "https://tenderiq.pl/rejestr/pieczec-12.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-12.txt.ots",
                "bitcoin_block": 974604
            }
        },
        {
            "version": 6,
            "recorded_at": "2026-11-04T23:19:49Z",
            "content": "{\"cpv\": \"45111000\", \"url\": \"https://ezamowienia.gov.pl/mo-client-board/bzp/notice-details/id/08df38e7-9f85-7d37-e2d6-6b000120cbda\", \"buyer\": \"Miasto Zielonka\", \"title\": \"Modernizacja chodnika, zjazdów do nieruchomości w ul. Warmińskiej w Zielonce- I etap modernizacji drogi gminnej.\", \"region\": \"mazowieckie\", \"source\": \"ezamowienia_notices\", \"status\": \"active\", \"cpv_more\": [\"45233300\", \"45233142\", \"45233100\"], \"location\": \"Zielonka, mazowieckie\", \"buyer_nip\": \"1251334816\", \"source_id\": \"2026/BZP 00516989/01\", \"deadline_at\": \"2026-11-18T09:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-11-02T13:45:57Z\", \"notice_number\": \"2026/BZP 00516989/01\", \"procedure_url\": \"https://zielonka.ezamawiajacy.pl/pn/zielonka/demand/notice/public/241577/details\"}",
            "content_hash": "6dc9d31f6522eeac39e3dc25c1002019ae37bbc2fe7157a47bba783480d7abde",
            "prev_hash": "9440de69a16e8088b8cfe9dd9ed46eebb2b2beade10669ac9958813b40a50ae1",
            "hash": "ea5e530e2eda2e74fdbc46f1ab0d6360c7cae7f1d72e2ab17970c4af677c859f",
            "actor": null,
            "seal": null
        },
        {
            "version": 7,
            "recorded_at": "2026-11-05T02:33:36Z",
            "content": "{\"cpv\": \"45233140\", \"url\": \"https://ezamowienia.gov.pl/mo-client-board/bzp/notice-details/id/08df38e7-9f85-7d37-e2d6-6b000120cbda\", \"buyer\": \"Miasto Zielonka\", \"title\": \"Modernizacja chodnika, zjazdów do nieruchomości w ul. Warmińskiej w Zielonce- I etap modernizacji drogi gminnej.\", \"region\": \"mazowieckie\", \"source\": \"ezamowienia_notices\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Zielonka, mazowieckie\", \"buyer_nip\": \"1251334816\", \"source_id\": \"2026/BZP 00516989/01\", \"deadline_at\": \"2026-11-18T09:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-11-02T13:45:57Z\", \"notice_number\": \"2026/BZP 00516989/01\", \"procedure_url\": \"https://zielonka.ezamawiajacy.pl/pn/zielonka/demand/notice/public/241577/details\"}",
            "content_hash": "f7f0883ebce7a36f3e05235610a8fb5f4a34a489ac8f28974e050ee37483566d",
            "prev_hash": "ea5e530e2eda2e74fdbc46f1ab0d6360c7cae7f1d72e2ab17970c4af677c859f",
            "hash": "05352b82cbcc275d5813bad132febc67ed68abf7d636104667cb6fbd81289eff",
            "actor": null,
            "seal": null
        },
        {
            "version": 8,
            "recorded_at": "2026-11-05T04:43:33Z",
            "content": "{\"cpv\": \"45111000\", \"url\": \"https://ezamowienia.gov.pl/mo-client-board/bzp/notice-details/id/08df38e7-9f85-7d37-e2d6-6b000120cbda\", \"buyer\": \"Miasto Zielonka\", \"title\": \"Modernizacja chodnika, zjazdów do nieruchomości w ul. Warmińskiej w Zielonce- I etap modernizacji drogi gminnej.\", \"region\": \"mazowieckie\", \"source\": \"ezamowienia_notices\", \"status\": \"active\", \"cpv_more\": [\"45233300\", \"45233142\", \"45233100\"], \"location\": \"Zielonka, mazowieckie\", \"buyer_nip\": \"1251334816\", \"source_id\": \"2026/BZP 00516989/01\", \"deadline_at\": \"2026-11-18T09:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-11-02T13:45:57Z\", \"notice_number\": \"2026/BZP 00516989/01\", \"procedure_url\": \"https://zielonka.ezamawiajacy.pl/pn/zielonka/demand/notice/public/241577/details\"}",
            "content_hash": "6dc9d31f6522eeac39e3dc25c1002019ae37bbc2fe7157a47bba783480d7abde",
            "prev_hash": "05352b82cbcc275d5813bad132febc67ed68abf7d636104667cb6fbd81289eff",
            "hash": "07088462a8538f1777867097f0c440b019710834f8e8e5d59603bb27e6005596",
            "actor": null,
            "seal": null
        },
        {
            "version": 9,
            "recorded_at": "2026-11-05T06:00:03Z",
            "content": "{\"cpv\": \"45233140\", \"url\": \"https://ezamowienia.gov.pl/mo-client-board/bzp/notice-details/id/08df38e7-9f85-7d37-e2d6-6b000120cbda\", \"buyer\": \"Miasto Zielonka\", \"title\": \"Modernizacja chodnika, zjazdów do nieruchomości w ul. Warmińskiej w Zielonce- I etap modernizacji drogi gminnej.\", \"region\": \"mazowieckie\", \"source\": \"ezamowienia_notices\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Zielonka, mazowieckie\", \"buyer_nip\": \"1251334816\", \"source_id\": \"2026/BZP 00516989/01\", \"deadline_at\": \"2026-11-18T09:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-11-02T13:45:57Z\", \"notice_number\": \"2026/BZP 00516989/01\", \"procedure_url\": \"https://zielonka.ezamawiajacy.pl/pn/zielonka/demand/notice/public/241577/details\"}",
            "content_hash": "f7f0883ebce7a36f3e05235610a8fb5f4a34a489ac8f28974e050ee37483566d",
            "prev_hash": "07088462a8538f1777867097f0c440b019710834f8e8e5d59603bb27e6005596",
            "hash": "8f33d95015011760978a69e7ded27ea056a2be07d399545caa5e192dd880d05a",
            "actor": null,
            "seal": null
        },
        {
            "version": 10,
            "recorded_at": "2026-11-05T06:34:34Z",
            "content": "{\"cpv\": \"45111000\", \"url\": \"https://ezamowienia.gov.pl/mo-client-board/bzp/notice-details/id/08df38e7-9f85-7d37-e2d6-6b000120cbda\", \"buyer\": \"Miasto Zielonka\", \"title\": \"Modernizacja chodnika, zjazdów do nieruchomości w ul. Warmińskiej w Zielonce- I etap modernizacji drogi gminnej.\", \"region\": \"mazowieckie\", \"source\": \"ezamowienia_notices\", \"status\": \"active\", \"cpv_more\": [\"45233300\", \"45233142\", \"45233100\"], \"location\": \"Zielonka, mazowieckie\", \"buyer_nip\": \"1251334816\", \"source_id\": \"2026/BZP 00516989/01\", \"deadline_at\": \"2026-11-18T09:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-11-02T13:45:57Z\", \"notice_number\": \"2026/BZP 00516989/01\", \"procedure_url\": \"https://zielonka.ezamawiajacy.pl/pn/zielonka/demand/notice/public/241577/details\"}",
            "content_hash": "6dc9d31f6522eeac39e3dc25c1002019ae37bbc2fe7157a47bba783480d7abde",
            "prev_hash": "8f33d95015011760978a69e7ded27ea056a2be07d399545caa5e192dd880d05a",
            "hash": "61d0cd42a14d89ae62320704f2a55644e5c9512a3bc19994f725df40428ca29f",
            "actor": null,
            "seal": null
        }
    ]
}