Claudio Constantini is a multiinstrumentalist (pianist, bandoneonist) and composer born in Peru and currently living in Spain. Known for his eclectic nature, he feels at home in a variety of musical g
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 0xc6ff45ce09fa78b114e5532d18c3e204ebb23d689f1f624d5c52c71afb2112ba. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3c3da2f-97f7-472b-bfe6-5a66d8ee18cf.json and https://artists.proofprofile.net/proofs/artist/f3c3da2f-97f7-472b-bfe6-5a66d8ee18cf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).