{"asset":{"asset_ref":"coart:asset:34","title":"Imperial-Style Beetle Brooch"},"canonicalization":"fractown-canon-v1","documents":{"files":[{"approved_at":"2026-10-02T08:39:00+00:00","doc_class":"other_evidence","doc_date":null,"name":"document_1.jpg","proposed_by":"administrator","sha256":"afd616ae49b560a13a6c57f7cb0a37a32d51cf625a821dfe6690df52f54883a3","title":"File 26-09-2019, 23 32 15.jpeg"}],"folder_uri":"https://arweave.net/tJdig3_JZOxvfFeHpJTphgNq3Kq4m5wZh_M4_bOO1fA"},"genesis":{"manifest_hash":"sha256:4e55fca0d4e53a95fef5cc06b182c83fcc9315c0540bcb86674e41b9b9886dd3","manifest_link":"https://arweave.net/prJdvw8RiPDNVfAkKfgZLskO7-QY_9Il9_HNTJvMjqY"},"identification":{"captures":[{"area":"whole object high resolution photo","media_type":"image/x-canon-cr3","name":"identification_490.cr3.enc","sha256":"b66950ffbedc6c2dcfe5c1ba7d8e82820147b29ab51303118c0ff1da46d31d1b","stored_sha256":"636910b666244db26554f463b044e106aa309c239ba692d81d5cfc36c1bf217b","technique":"other"}],"encryption":{"aad":"coart-identification-v2:34:<name>","custody":"one secret per object, held by CoArt UAB at the writing of this addendum for the object's holder","key_ref":"coart:identification-key:34","keys":"encryption key and nonce key are HMAC-SHA256 of the object's secret over 'coart-capture-encrypt' and 'coart-capture-nonce'","layout":"nonce12|ciphertext|tag16","nonce":"HMAC-SHA256(nonce_key, aad || 0x00 || sha256(plaintext) as ASCII hex)[:12]","scheme":"AES-256-GCM"},"fingerprint_sha256":"4dbd7da1c74a79ca227ff3ee3a85c6b57fd22b9b99f97721bb04a65f3a92f874","schema":"coart-identification-v2"},"media":{"files":[{"media_type":"image/jpeg","name":"gallery_491.jpg","sha256":"e23ecc8aa4c916992d9066cb4b710f4a3830dad48d1294d10b5be06808c1ca48"}],"folder_uri":"https://arweave.net/tJdig3_JZOxvfFeHpJTphgNq3Kq4m5wZh_M4_bOO1fA"},"previous_addendum":{"hash":"sha256:948dd607eb49d8850d153f7dbdf75899a109ec152165a8404372e785a1d0969e","link":"https://arweave.net/YbMTuXn_3lutWXvvn_OxeE4MRhcstzEQ_Jwf_GeY0Xo"},"schema":"fractown-fcc-addendum-v2","sequence":5,"symbol_mosaic_id":"17A1DDBE768130C1","written_at":"2026-10-02T08:39:00+00:00","written_by":"coart:administrator"}