Arte Mixto were a six-member Cuban band of the 1990s from Cienfuegos. The band included singer Iris Sandra Cepeda and percussionist Carlos Manuel Veliz. The group's 1997 album Deseos was well received
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 0xace77d2f3cea9217fbfdf4460e41786a3ff2c6252696537378a4ac17bd887f85. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7433a56e-adcf-4b21-babf-8c12286c3dee.json and https://artists.proofprofile.net/proofs/artist/7433a56e-adcf-4b21-babf-8c12286c3dee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).