Jackeline Martins Petkovic (born November 10, 1980) is a Brazilian model, singer, actress and television host. Personal life She is of Croatian, Portuguese, Russian and German descent. Career
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4ae9b71a0391d120497ef7d7d2f0759526ad85c3d1edbcf4d767a501160bef. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13ee37a1-1a21-4b00-8662-911ccbbd2f7e.json and https://artists.proofprofile.net/proofs/artist/13ee37a1-1a21-4b00-8662-911ccbbd2f7e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).