Ramón Vargas (born 11 September 1960) is a Mexican operatic tenor. Since his debut in the early '90s, he has developed to become one of the most acclaimed tenors of the 21st century. Known for his mos
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 0x345d05775765efc666bd2988e3e134ff4f5190decf373bfdd227c078ae5e3a75. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7a2fd65-19f0-4026-93eb-1bd123872bfa.json and https://artists.proofprofile.net/proofs/artist/f7a2fd65-19f0-4026-93eb-1bd123872bfa.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.