{
    "tender_id": 3260376,
    "check": {
        "ok": true,
        "versions": 4,
        "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": "2026-10-25T20:08:13Z",
            "content": "{\"cpv\": \"33150000\", \"url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/530448/dostawa-systemu-do-hipertermii-glebokiej-wraz-z-modernizacja-bunkra\", \"buyer\": \"NARODOWY INSTYTUT ONKOLOGII IM. MARII SKŁODOWSKIEJ-CURIE - PAŃSTWOWY INSTYTUT BADAWCZY\", \"title\": \"Dostawa systemu do hipertermii głębokiej wraz z modernizacją bunkra.\", \"source\": \"eb2b_public\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"530448\", \"deadline_at\": \"2026-11-06T08:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-01T07:30:00Z\"}",
            "content_hash": "07ecb458ecedb5a3bcefda2ebde85cb75f3cef8a11370a201827a8a4f430bf2f",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "31921b9a53f39823dcc056e28529bc1f6f21a32491d0c226e7ecfe3c90eeb463",
            "actor": null,
            "seal": {
                "id": 2,
                "digest": "6af9ff920846d2ed2fae131d9f0f0d3d71bdf63cfd98a8a18b81289d63fe5e04",
                "file": "https://tenderiq.pl/rejestr/pieczec-2.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-2.txt.ots",
                "bitcoin_block": 973147
            }
        },
        {
            "version": 2,
            "recorded_at": "2026-10-25T23:35:59Z",
            "content": "{\"cpv\": \"33150000\", \"url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/530448/dostawa-systemu-do-hipertermii-glebokiej-wraz-z-modernizacja-bunkra\", \"buyer\": \"NARODOWY INSTYTUT ONKOLOGII IM. MARII SKŁODOWSKIEJ-CURIE - PAŃSTWOWY INSTYTUT BADAWCZY\", \"title\": \"Dostawa systemu do hipertermii głębokiej wraz z modernizacją bunkra.\", \"source\": \"eb2b_public\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"530448\", \"deadline_at\": \"2026-11-06T08:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-01T07:30:00Z\", \"procedure_url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/530448/dostawa-systemu-do-hipertermii-glebokiej-wraz-z-modernizacja-bunkra\"}",
            "content_hash": "86971c70d41963ce5c4bcc99e0a134744016db304be3f44c98355bfcc7c7b5f4",
            "prev_hash": "31921b9a53f39823dcc056e28529bc1f6f21a32491d0c226e7ecfe3c90eeb463",
            "hash": "319251c9bbc04cbe7a3b37f36e71784916fe9a937309331868d2a4c54eccd50d",
            "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": 3,
            "recorded_at": "2026-10-26T23:35:51Z",
            "content": "{\"cpv\": \"33150000\", \"url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/530448/dostawa-systemu-do-hipertermii-glebokiej-wraz-z-modernizacja-bunkra\", \"buyer\": \"NARODOWY INSTYTUT ONKOLOGII IM. MARII SKŁODOWSKIEJ-CURIE - PAŃSTWOWY INSTYTUT BADAWCZY\", \"title\": \"Dostawa systemu do hipertermii głębokiej wraz z modernizacją bunkra.\", \"source\": \"eb2b_public\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"530448\", \"deadline_at\": \"2026-11-06T08:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-01T07:30:00Z\", \"procedure_url\": \"https://oneplace.marketplanet.pl/zapytania-ofertowe-przetargi/-/rfp/view/3811474/dostawa-systemu-do-hipertermii-glebokiej-wraz-z-modernizacja-bunkra-\"}",
            "content_hash": "7ffb23476902ecffbac654a7615a5a0f630be4505eb0f5de2eadb15e62af119a",
            "prev_hash": "319251c9bbc04cbe7a3b37f36e71784916fe9a937309331868d2a4c54eccd50d",
            "hash": "ebf4b5ceccade3e9e2f0b76e080c4e8321abc727f740436cc98c405f2c7767a3",
            "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": 4,
            "recorded_at": "2026-10-27T11:33:45Z",
            "content": "{\"cpv\": \"33150000\", \"url\": \"https://platforma.eb2b.com.pl/open-preview-auction.html/530448/dostawa-systemu-do-hipertermii-glebokiej-wraz-z-modernizacja-bunkra\", \"buyer\": \"NARODOWY INSTYTUT ONKOLOGII IM. MARII SKŁODOWSKIEJ-CURIE - PAŃSTWOWY INSTYTUT BADAWCZY\", \"title\": \"Dostawa systemu do hipertermii głębokiej wraz z modernizacją bunkra.\", \"source\": \"eb2b_public\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"530448\", \"deadline_at\": \"2026-11-06T08:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-01T07:30:00Z\", \"procedure_url\": \"https://nio.eb2b.com.pl/open-preview-auction.html/530448/dostawa-systemu-do-hipertermii-glebokiej-wraz-z-modernizacja-bunkra\"}",
            "content_hash": "d05b027b7b4abef7645a46e743149bbee346e0e69c783934ae9aa951f683c59d",
            "prev_hash": "ebf4b5ceccade3e9e2f0b76e080c4e8321abc727f740436cc98c405f2c7767a3",
            "hash": "4499604b7fc2ba5a5645ff0a74bcc9effe90cd5e2d8d4e922ce444fc65a6372a",
            "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
            }
        }
    ]
}