{
    "tender_id": 4134300,
    "check": {
        "ok": true,
        "versions": 2,
        "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": "2026-10-30T12:59:43Z",
            "content": "{\"cpv\": \"79300000\", \"url\": \"https://kolejeslaskie.eb2b.com.pl/open-preview-auction.html/536399/badanie-rynku-na-sukcesywne-dostawy-artykulow-spozywczych\", \"buyer\": \"KOLEJE ŚLĄSKIE SP. Z O.O.\", \"title\": \"Badanie rynku na sukcesywne dostawy artykułów spożywczych\", \"region\": \"slaskie\", \"source\": \"koleje_slaskie_eb2b\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"ŚLĄSKIE\", \"source_id\": \"536399\", \"deadline_at\": \"2026-11-09T11:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-30T11:00:00Z\"}",
            "content_hash": "539b10c356ff19bdf6fa99b3d36b7de1f0a522cf225f3d09642da3fe2d2a2bcd",
            "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
            "hash": "4f1b058d4a785c8e02cac9f75a5636529a3a71e5dbdf8d52b344247d0a159866",
            "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": "2026-10-30T14:45:37Z",
            "content": "{\"cpv\": \"79300000\", \"url\": \"https://kolejeslaskie.eb2b.com.pl/open-preview-auction.html/536399/badanie-rynku-na-sukcesywne-dostawy-artykulow-spozywczych\", \"buyer\": \"KOLEJE ŚLĄSKIE SP. Z O.O.\", \"title\": \"Badanie rynku na sukcesywne dostawy artykułów spożywczych\", \"region\": \"slaskie\", \"source\": \"koleje_slaskie_eb2b\", \"status\": \"active\", \"cpv_more\": [], \"location\": \"ŚLĄSKIE\", \"source_id\": \"536399\", \"deadline_at\": \"2026-11-09T11:00:00Z\", \"notice_type\": \"Ogloszenie o zamowieniu\", \"published_at\": \"2026-10-30T11:00:00Z\", \"procedure_url\": \"https://kolejeslaskie.eb2b.com.pl/open-preview-auction.html/536399/badanie-rynku-na-sukcesywne-dostawy-artykulow-spozywczych\"}",
            "content_hash": "22848e6b996cd91d071fdae9950134487dbdca5393a2ad7fc2a0ba988bf1093d",
            "prev_hash": "4f1b058d4a785c8e02cac9f75a5636529a3a71e5dbdf8d52b344247d0a159866",
            "hash": "85c3fcf0f41a9f8f14aecaf31d30556e99124fee504db1cb922fd2f0583d9fbd",
            "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
            }
        }
    ]
}