{
    "tender_id": 3442517,
    "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": "2026-10-26T20:27:51Z",
            "content": "{\"cpv\": \"73100000\", \"url\": \"https://platformazakupowa.pl/transakcja/1397675\", \"buyer\": \"Narodowe Centrum Badań i Rozwoju\", \"title\": \"145/26/PU/P44 145/26/PU/P44 PCP - Modułowa stacja do automatycznej produkcji nawozów mikrobiologicznych na bazie izolatów środowiskowych\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Polska\", \"source_id\": \"1397675\", \"deadline_at\": \"2026-11-09T11:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-26T20:27:51Z\", \"notice_number\": \"1397675\"}",
            "content_hash": "7ca610bd350d1d73866280bf8fa43b794c42749a09a292f8fdbcbb63ba918000",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "7792a18fb4a9d0e5bf38cc360d1918291cf14ac7966ea556f4790de8f777e323",
            "actor": null,
            "seal": {
                "id": 3,
                "digest": "1119fd2ade60dc88ac794742ff488b9486e8a488f9d77cc6d6a9444474dc1c77",
                "file": "https://tenderiq.pl/rejestr/pieczec-3.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-3.txt.ots",
                "bitcoin_block": 973309
            }
        },
        {
            "version": 2,
            "recorded_at": "2026-10-26T23:36:09Z",
            "content": "{\"cpv\": \"73100000\", \"url\": \"https://platformazakupowa.pl/transakcja/1397675\", \"buyer\": \"Narodowe Centrum Badań i Rozwoju\", \"title\": \"145/26/PU/P44 145/26/PU/P44 PCP - Modułowa stacja do automatycznej produkcji nawozów mikrobiologicznych na bazie izolatów środowiskowych\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Polska\", \"source_id\": \"1397675\", \"deadline_at\": \"2026-11-09T11:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-26T20:27:51Z\", \"notice_number\": \"1397675\", \"procedure_url\": \"https://platformazakupowa.pl/transakcja/1397675\"}",
            "content_hash": "84e26aeba7825796c84adcf3e2b98ea3ff91e698e1a7ecbe30cde9a2147ef250",
            "prev_hash": "7792a18fb4a9d0e5bf38cc360d1918291cf14ac7966ea556f4790de8f777e323",
            "hash": "bbb0aa18eb07da60c40f4b82ed73372fda3851ceb30774b6072eb0e08c5c219e",
            "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": 3,
            "recorded_at": "2026-10-27T00:40:50Z",
            "content": "{\"cpv\": \"73100000\", \"url\": \"https://platformazakupowa.pl/transakcja/1397675\", \"buyer\": \"Narodowe Centrum Badań i Rozwoju\", \"title\": \"145/26/PU/P44 145/26/PU/P44 PCP - Modułowa stacja do automatycznej produkcji nawozów mikrobiologicznych na bazie izolatów środowiskowych\", \"source\": \"platformazakupowa\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"Polska\", \"source_id\": \"1397675\", \"deadline_at\": \"2026-11-09T11:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-26T05:58:00Z\", \"notice_number\": \"1397675\", \"procedure_url\": \"https://platformazakupowa.pl/transakcja/1397675\"}",
            "content_hash": "1556c1f9ae84d8e620f1a673d7dda164df4057f70faf6e313512fe08cb27ea7f",
            "prev_hash": "bbb0aa18eb07da60c40f4b82ed73372fda3851ceb30774b6072eb0e08c5c219e",
            "hash": "04dd108225c5b5fd0826231f37b8f01027cac668e78eb4468028bbb5802d7663",
            "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
            }
        }
    ]
}