{
    "tender_id": 3538465,
    "check": {
        "ok": true,
        "versions": 2,
        "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": "2026-10-27T07:39:21Z",
            "content": "{\"cpv\": \"16000000\", \"url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/535688/pantograf-160-ec-3kv-dc-symbol-pdt-1\", \"buyer\": \"POLREGIO S.A.\", \"title\": \"Pantograf 160 EC - 3kV DC symbol PDT\", \"source\": \"eb2b_public\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"535688\", \"deadline_at\": \"2026-11-02T11:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-27T06:30:00Z\"}",
            "content_hash": "ceb47e2b71d64f026e0580565054cf6f0bce108084ce155ac516b8336e8893a8",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "631adc4ba541bebaff13dfd8a13cd9bbabf437863719ace8dbf07c19b999225e",
            "actor": null,
            "seal": {
                "id": 4,
                "digest": "1a6d1144791ca08d9453bd1c8d38a6c251eb74cb6d377626fde25c11a52ccc7a",
                "file": "https://tenderiq.pl/rejestr/pieczec-4.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-4.txt.ots",
                "bitcoin_block": 973472
            }
        },
        {
            "version": 2,
            "recorded_at": "2026-10-27T11:33:42Z",
            "content": "{\"cpv\": \"16000000\", \"url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/535688/pantograf-160-ec-3kv-dc-symbol-pdt-1\", \"buyer\": \"POLREGIO S.A.\", \"title\": \"Pantograf 160 EC - 3kV DC symbol PDT\", \"source\": \"eb2b_public\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"535688\", \"deadline_at\": \"2026-11-02T11:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-27T06:30:00Z\", \"procedure_url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/535577/pantograf-160-ec-3kv-dc-symbol-pdt\"}",
            "content_hash": "bd87a403be6f503a6e37b12b6ba8cccfa74a174c29485fb18dd5fdef7ae4d855",
            "prev_hash": "631adc4ba541bebaff13dfd8a13cd9bbabf437863719ace8dbf07c19b999225e",
            "hash": "f82c3b31313592711d88b0762235bceafa8a9e537e7498c8f251ee509ddda68f",
            "actor": null,
            "seal": {
                "id": 4,
                "digest": "1a6d1144791ca08d9453bd1c8d38a6c251eb74cb6d377626fde25c11a52ccc7a",
                "file": "https://tenderiq.pl/rejestr/pieczec-4.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-4.txt.ots",
                "bitcoin_block": 973472
            }
        }
    ]
}