Carlos del Junco (born May 17, 1958) is a Cuban-Canadian harmonica player. Career Del Junco was born in Cuba and moved to Canada with his family in 1959. He started to play harmonica when he was four
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 0xf5d75a5a97bae15c840cc1d3e17f6e8f383b691ed20018a7934ed0178ccfab45. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee5f644a-2364-41aa-b745-54d0eee58270.json and https://artists.proofprofile.net/proofs/artist/ee5f644a-2364-41aa-b745-54d0eee58270.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).