{
    "tender_id": 4713514,
    "check": {
        "ok": true,
        "versions": 6,
        "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": "2026-11-02T05:57:43Z",
            "content": "{\"cpv\": \"09300000\", \"url\": \"https://ted.europa.eu/pl/notice/-/detail/760319-2026\", \"buyer\": \"Polska Akademia Nauk\", \"title\": \"Polska – Energia elektryczna, cieplna, słoneczna i jądrowa – Zakup energii elektrycznej na potrzeby Polskiej Akademii Nauk i jej jednostek organizacyjnych\", \"region\": \"mazowieckie\", \"source\": \"ted\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"PL911, POL, PL911, POL\", \"buyer_nip\": \"5251575083\", \"source_id\": \"760319-2026\", \"deadline_at\": \"2026-11-10T11:00:00Z\", \"notice_type\": \"Ogłoszenie TED\", \"published_at\": \"2026-11-02T01:00:00Z\"}",
            "content_hash": "5400bb543da0df3c9100a121776a6af06474238f5f34d25a9f92616c915c44ac",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "3e4e2a7bc39423779b19fed23641451f98d5638834d926752a98b5848b04607e",
            "actor": null,
            "seal": {
                "id": 10,
                "digest": "297505af1d9d820e84b46bcdd40ae11b1ffc912134eeb69a764090ac7f9838b4",
                "file": "https://tenderiq.pl/rejestr/pieczec-10.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-10.txt.ots",
                "bitcoin_block": 974314
            }
        },
        {
            "version": 2,
            "recorded_at": "2026-11-02T19:33:11Z",
            "content": "{\"cpv\": \"09300000\", \"url\": \"https://ted.europa.eu/pl/notice/-/detail/760319-2026\", \"buyer\": \"Polska Akademia Nauk\", \"title\": \"Polska – Energia elektryczna, cieplna, słoneczna i jądrowa – Zakup energii elektrycznej na potrzeby Polskiej Akademii Nauk i jej jednostek organizacyjnych\", \"region\": \"mazowieckie\", \"source\": \"ted\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"PL911, POL, PL911, POL\", \"buyer_nip\": \"5251575083\", \"source_id\": \"760319-2026\", \"deadline_at\": \"2026-11-10T11:00:00Z\", \"notice_type\": \"Ogłoszenie TED\", \"published_at\": \"2026-11-02T01:00:00Z\", \"procedure_url\": \"https://pan.logintrade.net/zapytania_email,241997,6f84c7fc9cbd6316113ff14fbbc1347d.html\"}",
            "content_hash": "103daade41e13887af37740d0e9f4d86cb10ff3cd8c5d52496136f1f52bdd7ee",
            "prev_hash": "3e4e2a7bc39423779b19fed23641451f98d5638834d926752a98b5848b04607e",
            "hash": "16b5c77df4f2eff1e27e8a6f3b058ebb2b88f1493ab9ca0003f5956ef247cb99",
            "actor": null,
            "seal": {
                "id": 10,
                "digest": "297505af1d9d820e84b46bcdd40ae11b1ffc912134eeb69a764090ac7f9838b4",
                "file": "https://tenderiq.pl/rejestr/pieczec-10.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-10.txt.ots",
                "bitcoin_block": 974314
            }
        },
        {
            "version": 3,
            "recorded_at": "2026-11-04T05:45:29Z",
            "content": "{\"cpv\": \"09300000\", \"url\": \"https://ted.europa.eu/pl/notice/-/detail/760319-2026\", \"buyer\": \"Polska Akademia Nauk\", \"title\": \"Polska – Energia elektryczna, cieplna, słoneczna i jądrowa – Zakup energii elektrycznej na potrzeby Polskiej Akademii Nauk i jej jednostek organizacyjnych\", \"region\": \"mazowieckie\", \"source\": \"ted\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"PL911, POL, PL911, POL\", \"buyer_nip\": \"5251575083\", \"source_id\": \"760319-2026\", \"deadline_at\": \"2026-11-10T11:00:00Z\", \"notice_type\": \"Ogłoszenie TED\", \"published_at\": \"2026-11-02T01:00:00Z\", \"procedure_url\": \"https://ted.europa.eu/pl/notice/-/detail/760319-2026\"}",
            "content_hash": "ae02034a899801ee0c531c87b13dcf160bdc5ab2874c7e1c1e41c64cd1756340",
            "prev_hash": "16b5c77df4f2eff1e27e8a6f3b058ebb2b88f1493ab9ca0003f5956ef247cb99",
            "hash": "5da08f599eb13cf6e25d29712d9562286a461bd0b9da8bcd9d0479e4da1aaf8b",
            "actor": null,
            "seal": {
                "id": 12,
                "digest": "e23c0f5a7e440e937f514487a150dc1be40887f39a941304e364e5e94a4b77fc",
                "file": "https://tenderiq.pl/rejestr/pieczec-12.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-12.txt.ots",
                "bitcoin_block": 974604
            }
        },
        {
            "version": 4,
            "recorded_at": "2026-11-04T10:46:25Z",
            "content": "{\"cpv\": \"09300000\", \"url\": \"https://ted.europa.eu/pl/notice/-/detail/760319-2026\", \"buyer\": \"Polska Akademia Nauk\", \"title\": \"Polska – Energia elektryczna, cieplna, słoneczna i jądrowa – Zakup energii elektrycznej na potrzeby Polskiej Akademii Nauk i jej jednostek organizacyjnych\", \"region\": \"mazowieckie\", \"source\": \"ted\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"PL911, POL, PL911, POL\", \"buyer_nip\": \"5251575083\", \"source_id\": \"760319-2026\", \"deadline_at\": \"2026-11-10T11:00:00Z\", \"notice_type\": \"Ogłoszenie TED\", \"published_at\": \"2026-11-02T01:00:00Z\", \"procedure_url\": \"https://oneplace.marketplanet.pl/zapytania-ofertowe-przetargi/-/rfp/view/3819987/zakup-energii-elektrycznej-na-potrzeby-polskiej-akademii-nauk-i-jej-jednostek-organizacyjnych\"}",
            "content_hash": "0962062cf80972defc909c04130f489ded1f2de11926f3cac54e2ba934c815d8",
            "prev_hash": "5da08f599eb13cf6e25d29712d9562286a461bd0b9da8bcd9d0479e4da1aaf8b",
            "hash": "b3b618bb2f0100d5ddbabe5aedfad07cfbd8ae325956b25f811e9b7522ff545b",
            "actor": null,
            "seal": {
                "id": 12,
                "digest": "e23c0f5a7e440e937f514487a150dc1be40887f39a941304e364e5e94a4b77fc",
                "file": "https://tenderiq.pl/rejestr/pieczec-12.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-12.txt.ots",
                "bitcoin_block": 974604
            }
        },
        {
            "version": 5,
            "recorded_at": "2026-11-04T11:33:57Z",
            "content": "{\"cpv\": \"09300000\", \"url\": \"https://ted.europa.eu/pl/notice/-/detail/760319-2026\", \"buyer\": \"Polska Akademia Nauk\", \"title\": \"Polska – Energia elektryczna, cieplna, słoneczna i jądrowa – Zakup energii elektrycznej na potrzeby Polskiej Akademii Nauk i jej jednostek organizacyjnych\", \"region\": \"mazowieckie\", \"source\": \"ted\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"PL911, POL, PL911, POL\", \"buyer_nip\": \"5251575083\", \"source_id\": \"760319-2026\", \"deadline_at\": \"2026-11-10T11:00:00Z\", \"notice_type\": \"Ogłoszenie TED\", \"published_at\": \"2026-11-02T01:00:00Z\", \"procedure_url\": \"https://pan.logintrade.net/zapytania_email,241997,6f84c7fc9cbd6316113ff14fbbc1347d.html\"}",
            "content_hash": "103daade41e13887af37740d0e9f4d86cb10ff3cd8c5d52496136f1f52bdd7ee",
            "prev_hash": "b3b618bb2f0100d5ddbabe5aedfad07cfbd8ae325956b25f811e9b7522ff545b",
            "hash": "102015ef778d22038e84f220a06842fd8667ad7dab561be20d20d5b8daa396c0",
            "actor": null,
            "seal": {
                "id": 12,
                "digest": "e23c0f5a7e440e937f514487a150dc1be40887f39a941304e364e5e94a4b77fc",
                "file": "https://tenderiq.pl/rejestr/pieczec-12.txt",
                "proof": "https://tenderiq.pl/rejestr/pieczec-12.txt.ots",
                "bitcoin_block": 974604
            }
        },
        {
            "version": 6,
            "recorded_at": "2026-11-05T11:34:57Z",
            "content": "{\"cpv\": \"09300000\", \"url\": \"https://ted.europa.eu/pl/notice/-/detail/760319-2026\", \"buyer\": \"Polska Akademia Nauk\", \"title\": \"Polska – Energia elektryczna, cieplna, słoneczna i jądrowa – Zakup energii elektrycznej na potrzeby Polskiej Akademii Nauk i jej jednostek organizacyjnych\", \"region\": \"mazowieckie\", \"source\": \"ted\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"PL911, POL, PL911, POL\", \"buyer_nip\": \"5251575083\", \"source_id\": \"760319-2026\", \"deadline_at\": \"2026-11-10T11:00:00Z\", \"notice_type\": \"Ogłoszenie TED\", \"published_at\": \"2026-11-02T01:00:00Z\", \"procedure_url\": \"https://oneplace.marketplanet.pl/zapytania-ofertowe-przetargi/-/rfp/view/3819987/zakup-energii-elektrycznej-na-potrzeby-polskiej-akademii-nauk-i-jej-jednostek-organizacyjnych\"}",
            "content_hash": "0962062cf80972defc909c04130f489ded1f2de11926f3cac54e2ba934c815d8",
            "prev_hash": "102015ef778d22038e84f220a06842fd8667ad7dab561be20d20d5b8daa396c0",
            "hash": "ac2e8b9e477ca038e9372a23d837be41dc5faeb672410335c939faddbc0c627a",
            "actor": null,
            "seal": null
        }
    ]
}