{
    "tender_id": 3349359,
    "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": "2026-10-26T09:02:52Z",
            "content": "{\"cpv\": \"79500000\", \"url\": \"https://bip.pan.pl/przetarg/p-zaproszenie-do-skladania-ofert-w-celu-rozeznania-rynku-cen-na-zakup-systemu-monitoringu-z-mozliwoscia-udzielenia-zamowienia\", \"buyer\": \"Polska Akademia Nauk\", \"title\": \"ZAPROSZENIE DO SKŁADANIA OFERT w celu rozeznania rynku cen na „zakup systemu monitoringu” – z możliwością udzielenia zamówienia\", \"source\": \"pan_bip\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"p-zaproszenie-do-skladania-ofert-w-celu-rozeznania-rynku-cen-na-zakup-systemu-monitoringu-z-mozliwoscia-udzielenia-zamowienia\", \"deadline_at\": \"2026-10-29T11:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-26T09:03:22Z\"}",
            "content_hash": "75781303b5e329defc96d693df6f16888284a7486922468e11fff016ddd26137",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "e3f05f3fde0d16c62136606a4ae263495df2aef95bd1027595ea7fc1d4913910",
            "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": "2026-10-26T23:35:21Z",
            "content": "{\"cpv\": \"79500000\", \"url\": \"https://bip.pan.pl/przetarg/p-zaproszenie-do-skladania-ofert-w-celu-rozeznania-rynku-cen-na-zakup-systemu-monitoringu-z-mozliwoscia-udzielenia-zamowienia\", \"buyer\": \"Polska Akademia Nauk\", \"title\": \"ZAPROSZENIE DO SKŁADANIA OFERT w celu rozeznania rynku cen na „zakup systemu monitoringu” – z możliwością udzielenia zamówienia\", \"source\": \"pan_bip\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"p-zaproszenie-do-skladania-ofert-w-celu-rozeznania-rynku-cen-na-zakup-systemu-monitoringu-z-mozliwoscia-udzielenia-zamowienia\", \"deadline_at\": \"2026-10-29T11:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-26T09:03:22Z\", \"procedure_url\": \"https://oneplace.marketplanet.pl/zapytania-ofertowe-przetargi/-/rfp/view/3847304/zaproszenie-do-skladania-ofert-na-ibp\"}",
            "content_hash": "30a4b5374842a8ca0a47c7be5b7f32f8e0d19d8cc58ce37686d121ccf436bf34",
            "prev_hash": "e3f05f3fde0d16c62136606a4ae263495df2aef95bd1027595ea7fc1d4913910",
            "hash": "4ec459f54b7436b6ff3d39b9662895a5ec0ae9da044fa476b71a28530a9aa528",
            "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": "2026-10-27T19:35:47Z",
            "content": "{\"cpv\": \"79500000\", \"url\": \"https://bip.pan.pl/przetarg/p-zaproszenie-do-skladania-ofert-w-celu-rozeznania-rynku-cen-na-zakup-systemu-monitoringu-z-mozliwoscia-udzielenia-zamowienia\", \"buyer\": \"Polska Akademia Nauk\", \"title\": \"ZAPROSZENIE DO SKŁADANIA OFERT w celu rozeznania rynku cen na „zakup systemu monitoringu” – z możliwością udzielenia zamówienia\", \"source\": \"pan_bip\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"p-zaproszenie-do-skladania-ofert-w-celu-rozeznania-rynku-cen-na-zakup-systemu-monitoringu-z-mozliwoscia-udzielenia-zamowienia\", \"deadline_at\": \"2026-10-29T11:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-26T09:03:22Z\"}",
            "content_hash": "75781303b5e329defc96d693df6f16888284a7486922468e11fff016ddd26137",
            "prev_hash": "4ec459f54b7436b6ff3d39b9662895a5ec0ae9da044fa476b71a28530a9aa528",
            "hash": "f44752d1daf53d0b98e0599bb08642770083dd96bce424930324c86cb7fcf3e5",
            "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": "2026-10-28T09:19:15Z",
            "content": "{\"cpv\": \"79500000\", \"url\": \"https://bip.pan.pl/przetarg/p-zaproszenie-do-skladania-ofert-w-celu-rozeznania-rynku-cen-na-zakup-systemu-monitoringu-z-mozliwoscia-udzielenia-zamowienia\", \"buyer\": \"Polska Akademia Nauk\", \"title\": \"ZAPROSZENIE DO SKŁADANIA OFERT w celu rozeznania rynku cen na „zakup systemu monitoringu” – z możliwością udzielenia zamówienia\", \"source\": \"pan_bip\", \"status\": \"active\", \"cpv_more\": [], \"source_id\": \"p-zaproszenie-do-skladania-ofert-w-celu-rozeznania-rynku-cen-na-zakup-systemu-monitoringu-z-mozliwoscia-udzielenia-zamowienia\", \"deadline_at\": \"2026-10-29T11:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-29T00:00:00Z\"}",
            "content_hash": "8cb08e904e4827955218e2d72336b2fb08cc978d472cdde41388e2567395e2c0",
            "prev_hash": "f44752d1daf53d0b98e0599bb08642770083dd96bce424930324c86cb7fcf3e5",
            "hash": "972625300604146589c0767cd06c5f9b5e646322363c70ee8be40932a6b50abe",
            "actor": null,
            "seal": {
                "id": 5,
                "digest": "0659ce1e2aadd7f69ed1ff4603a4290c070eaa14bbeed28a3c9a7cc2127acae9",
                "file": "https://tenderiq.pl/rejestr/pieczec-5.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-5.txt.ots",
                "bitcoin_block": 973609
            }
        }
    ]
}