{
    "tender_id": 4021495,
    "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": "2026-10-29T19:36:35Z",
            "content": "{\"cpv\": \"90620000\", \"url\": \"https://platformazakupowa.pl/transakcja/1400481\", \"buyer\": \"Gmina Miejska Tczew\", \"title\": \"ZUK.271.2.16.2026 Świadczenie usług zimowego utrzymania dróg (jezdni) na terenie miasta Tczewa\", \"region\": \"pomorskie\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Polska\", \"source_id\": \"1400481\", \"deadline_at\": \"2026-12-03T08:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-29T19:36:36Z\", \"notice_number\": \"1400481\"}",
            "content_hash": "246cbc29b07b7ad4555d27da715a35eea0b75ffc11c1bfe80915e846632411af",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "6e537281cfdc3d37db200cdf06fec42c60596b667f48b8a12d7f4b737aa19692",
            "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": 2,
            "recorded_at": "2026-10-29T19:45:59Z",
            "content": "{\"cpv\": \"90620000\", \"url\": \"https://platformazakupowa.pl/transakcja/1400481\", \"buyer\": \"Gmina Miejska Tczew\", \"title\": \"ZUK.271.2.16.2026 Świadczenie usług zimowego utrzymania dróg (jezdni) na terenie miasta Tczewa\", \"region\": \"pomorskie\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Polska\", \"source_id\": \"1400481\", \"deadline_at\": \"2026-12-03T08:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-29T19:36:36Z\", \"notice_number\": \"1400481\", \"procedure_url\": \"https://platformazakupowa.pl/transakcja/1400481\"}",
            "content_hash": "84a853db84fe1bb5741dbb15b2b85c66acb56345f14c36b7b5319996d257172d",
            "prev_hash": "6e537281cfdc3d37db200cdf06fec42c60596b667f48b8a12d7f4b737aa19692",
            "hash": "0e835234b2dffa1a0104175b4229099dfa85d39dc5820d327ee8929ae243782b",
            "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": 3,
            "recorded_at": "2026-10-30T03:30:40Z",
            "content": "{\"cpv\": \"90620000\", \"url\": \"https://platformazakupowa.pl/transakcja/1400481\", \"buyer\": \"Gmina Miejska Tczew\", \"title\": \"ZUK.271.2.16.2026 Świadczenie usług zimowego utrzymania dróg (jezdni) na terenie miasta Tczewa\", \"region\": \"pomorskie\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Polska\", \"source_id\": \"1400481\", \"deadline_at\": \"2026-12-03T08:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-29T10:31:00Z\", \"notice_number\": \"1400481\", \"procedure_url\": \"https://platformazakupowa.pl/transakcja/1400481\"}",
            "content_hash": "e81e4d7aaa46b918d0428c1215e5b584cbb73e58e5ed38bb9071f1956135177c",
            "prev_hash": "0e835234b2dffa1a0104175b4229099dfa85d39dc5820d327ee8929ae243782b",
            "hash": "3ea88d8448f1e0c0a2c75918eb207e27b83e33663521ac555150879fe6f97630",
            "actor": null,
            "seal": {
                "id": 7,
                "digest": "a9f75e7ec6726860fada5c5807cac164b76cf44582f14a01cd7b4a36f579f813",
                "file": "https://tenderiq.pl/rejestr/pieczec-7.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-7.txt.ots",
                "bitcoin_block": 973897
            }
        }
    ]
}