{
    "tender_id": 4778339,
    "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": "2026-11-02T13:53:11Z",
            "content": "{\"cpv\": \"34100000\", \"url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/536602/dostawa-przyciskow-do-autobusow-1\", \"buyer\": \"MIEJSKIE ZAKŁADY AUTOBUSOWE SP. Z O.O.\", \"title\": \"Dostawa przycisków do autobusów\", \"source\": \"eb2b_public\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"536602\", \"deadline_at\": \"2026-11-02T14:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-11-02T12:00:00Z\"}",
            "content_hash": "c216a6bdd0c87c53c07a3915fb6ce795b65a119bcd40dab8c941ca29d8f08ce2",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "fee59d13d25b9bfbe472bcdb969fad851d2303c35b820b9237b90527f676bf50",
            "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": "2026-11-02T14:16:27Z",
            "content": "{\"cpv\": \"34100000\", \"url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/536602/dostawa-przyciskow-do-autobusow-1\", \"buyer\": \"MIEJSKIE ZAKŁADY AUTOBUSOWE SP. Z O.O.\", \"title\": \"Dostawa przycisków do autobusów\", \"source\": \"eb2b_public\", \"status\": \"rejected\", \"cpv_more\": [], \"source_id\": \"536602\", \"deadline_at\": \"2026-11-02T14:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-11-02T12:00:00Z\"}",
            "content_hash": "60d9bd837797f38f0c3e93a48d19266e0cf47fa0b0a79c8e8734a9b6085de561",
            "prev_hash": "fee59d13d25b9bfbe472bcdb969fad851d2303c35b820b9237b90527f676bf50",
            "hash": "bd1520c19ce2ada66c3485c93f85201a8defe76a81510a68346288fb3317e46a",
            "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": "2026-11-02T17:27:12Z",
            "content": "{\"cpv\": \"34100000\", \"url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/536602/dostawa-przyciskow-do-autobusow-1\", \"buyer\": \"MIEJSKIE ZAKŁADY AUTOBUSOWE SP. Z O.O.\", \"title\": \"Dostawa przycisków do autobusów\", \"source\": \"eb2b_public\", \"status\": \"rejected\", \"cpv_more\": [], \"source_id\": \"536602\", \"deadline_at\": \"2026-11-13T09:30:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-11-02T12:00:00Z\"}",
            "content_hash": "c7b21aad28501fc0013138019f8e999e9f59c19cb691c695cc84db8cb7cdc689",
            "prev_hash": "bd1520c19ce2ada66c3485c93f85201a8defe76a81510a68346288fb3317e46a",
            "hash": "9fdef631cc94136bf631196eeeebc4531ff00b143068fca49be54d10837401ea",
            "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": 4,
            "recorded_at": "2026-11-02T17:28:05Z",
            "content": "{\"cpv\": \"34100000\", \"url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/536602/dostawa-przyciskow-do-autobusow-1\", \"buyer\": \"MIEJSKIE ZAKŁADY AUTOBUSOWE SP. Z O.O.\", \"title\": \"Dostawa przycisków do autobusów\", \"source\": \"eb2b_public\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"536602\", \"deadline_at\": \"2026-11-13T09:30:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-11-02T12:00:00Z\"}",
            "content_hash": "f75d175d7c7779f06f7bcb9937948e355cd36342bd8e9f6a481e2c39cca9a238",
            "prev_hash": "9fdef631cc94136bf631196eeeebc4531ff00b143068fca49be54d10837401ea",
            "hash": "16c231f4c2caa84e35d6b38c95d11997f4ea47c8e79a5da3c51df6d2f59e7b0c",
            "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": 5,
            "recorded_at": "2026-11-03T02:45:36Z",
            "content": "{\"cpv\": \"34100000\", \"url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/536602/dostawa-przyciskow-do-autobusow-1\", \"buyer\": \"MIEJSKIE ZAKŁADY AUTOBUSOWE SP. Z O.O.\", \"title\": \"Dostawa przycisków do autobusów\", \"source\": \"eb2b_public\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"536602\", \"deadline_at\": \"2026-11-13T09:30:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-11-02T12:00:00Z\", \"procedure_url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/536602/dostawa-przyciskow-do-autobusow-1\"}",
            "content_hash": "e247fa1e0e694ed06dd1b9b6a7549f8f7cb6b182ed6f6f95bbffd53f824eb4dc",
            "prev_hash": "16c231f4c2caa84e35d6b38c95d11997f4ea47c8e79a5da3c51df6d2f59e7b0c",
            "hash": "b3467b6f24c2bc7d0eed8630a7129a542a449f6eb9a06efa54d20694f476e45b",
            "actor": null,
            "seal": {
                "id": 11,
                "digest": "e9a17a70070a65f95be452321715a138cbb650567f41e2bae0faa2ffd562bbbd",
                "file": "https://tenderiq.pl/rejestr/pieczec-11.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-11.txt.ots",
                "bitcoin_block": 974456
            }
        }
    ]
}