Marcos Evangelista de Morais (born 7 June 1970), known as Cafu (), is a Brazilian former professional footballer who played as a right-back. Widely regarded as one of the greatest full-backs of all ti
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 0x16d6d4d76c4bcdf52a20697a7670c007ae3c49f6032463713662a5615b2e1942. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/acccd249-c14c-40b4-8348-aff3d1d59ab4.json and https://artists.proofprofile.net/proofs/artist/acccd249-c14c-40b4-8348-aff3d1d59ab4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).