200px|thumb|Juan Carlos Tolosa, 2009|alt=Headshot of Juan Carlos Tolosa Juan Carlos Tolosa (born in Córdoba, 2 October 1966) is an Argentinian composer, pianist, and conductor. Studies Juan Carlos T
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 0x240d0ee80610c9e1c227444d2df202269159dfc48ff8f27f731df8fc00494d53. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a490114-fe22-414b-988c-aae48dd2c0fd.json and https://artists.proofprofile.net/proofs/artist/4a490114-fe22-414b-988c-aae48dd2c0fd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).