{
    "tender_id": 4139781,
    "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": "2026-10-30T13:51:42Z",
            "content": "{\"cpv\": \"31521320\", \"url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/536336/dostawa-latarek-i-urzadzen-oswietleniowych-1\", \"buyer\": \"MPWIK W M. ST. WARSZAWIE S.A\", \"title\": \"Dostawa latarek i urządzeń oświetleniowych\", \"region\": \"mazowieckie\", \"source\": \"eb2b_public\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"536336\", \"deadline_at\": \"2026-11-06T10:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-30T08:00:00Z\"}",
            "content_hash": "d903bcf82d0cae6ef3071802b059e88f2f70a7fcb7535376a4a79d96a14dc8e7",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "cb68fa53dfb3d1938195904c76270f69465d854e8c124525cef68300fa3472ee",
            "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
            }
        },
        {
            "version": 2,
            "recorded_at": "2026-10-30T23:51:55Z",
            "content": "{\"cpv\": \"31521320\", \"url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/536336/dostawa-latarek-i-urzadzen-oswietleniowych-1\", \"buyer\": \"MIEJSKIE PRZEDSIĘBIORSTWO WODOCIĄGÓW I KANALIZACJI W M.ST. WARSZAWIE S.A\", \"title\": \"Dostawa latarek i urządzeń oświetleniowych\", \"region\": \"mazowieckie\", \"source\": \"eb2b_public\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"536336\", \"deadline_at\": \"2026-11-06T10:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-30T08:00:00Z\"}",
            "content_hash": "4470104b4581ca7f955fe503a5848209c7b37d23c665eca97365a8ca08737421",
            "prev_hash": "cb68fa53dfb3d1938195904c76270f69465d854e8c124525cef68300fa3472ee",
            "hash": "5694414dc32ba3b880b03a3a5f306623a9617735a1f04db99dac30a69c50e9b3",
            "actor": null,
            "seal": {
                "id": 8,
                "digest": "b9dfb65eef062a8f7633cee107df2b59fcca72ec5f093c9ceec0396cf65cd90d",
                "file": "https://tenderiq.pl/rejestr/pieczec-8.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-8.txt.ots",
                "bitcoin_block": 974039
            }
        },
        {
            "version": 3,
            "recorded_at": "2026-10-31T10:45:37Z",
            "content": "{\"cpv\": \"31521320\", \"url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/536336/dostawa-latarek-i-urzadzen-oswietleniowych-1\", \"buyer\": \"MIEJSKIE PRZEDSIĘBIORSTWO WODOCIĄGÓW I KANALIZACJI W M.ST. WARSZAWIE S.A\", \"title\": \"Dostawa latarek i urządzeń oświetleniowych\", \"region\": \"mazowieckie\", \"source\": \"eb2b_public\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"536336\", \"deadline_at\": \"2026-11-06T10:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-30T08:00:00Z\", \"procedure_url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/536336/dostawa-latarek-i-urzadzen-oswietleniowych-1\"}",
            "content_hash": "f07620add9d49cf17dea9d99ad10cbb30537a88bccaa5be0427b4c80e22e5666",
            "prev_hash": "5694414dc32ba3b880b03a3a5f306623a9617735a1f04db99dac30a69c50e9b3",
            "hash": "e1766697f5dc12ebc1a7d7a6b56298fcefa245a305598815356022aaa1359d91",
            "actor": null,
            "seal": {
                "id": 8,
                "digest": "b9dfb65eef062a8f7633cee107df2b59fcca72ec5f093c9ceec0396cf65cd90d",
                "file": "https://tenderiq.pl/rejestr/pieczec-8.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-8.txt.ots",
                "bitcoin_block": 974039
            }
        }
    ]
}