Jocy de Oliveira (formerly de Carvalho; born 11 April 1936) is a Brazilian pianist, multimedia artist and composer. Biography Jocy de Oliveira was born in Curitiba and grew up in São Paulo, Brazil. S
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19ea12749dcffbcb902e8ff3eba69dfee7f8836e5bb130249e5ea7105187de7. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f59e2b9-db7d-4605-b5ab-a757d1e7fc94.json and https://artists.proofprofile.net/proofs/artist/5f59e2b9-db7d-4605-b5ab-a757d1e7fc94.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).