Gabriel Rivano is an Argentine bandoneonist, guitarist, flutist and composer, born in Buenos Aires in 1958. He pursued studies at the Colegio Nacional de Buenos Aires where he graduated in 1976, and
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 0x4176409c8bdfd872e0a831cb4f0e664a06eecb1708e131e0195187a60f3881ce. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/050e4374-419e-4dcf-9ed1-9f9cebd43b59.json and https://artists.proofprofile.net/proofs/artist/050e4374-419e-4dcf-9ed1-9f9cebd43b59.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).