Cléverson Gabriel Córdova (born 9 August 1985), commonly known as Cléo, is a Brazilian former professional footballer who played as a forward. He also holds Serbian citizenship. While playing on thre
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 0xe0586f5a8b36df1563cf3347a016edb4e03a6fe50daf889f8b1d961b480e841f. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a802f971-25f4-49e0-b31c-81b0a554b889.json and https://artists.proofprofile.net/proofs/artist/a802f971-25f4-49e0-b31c-81b0a554b889.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).