Carlos Efrén Reyes Rosado (born May 2, 1991), known professionally as Farruko, is a Puerto Rican singer-songwriter, rapper, and record producer. He rose to fame collaborating with Daddy Yankee, J Balv
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1e683774c35f0d27af5b33d7b5e284fc39794147a2bb5502e246520ba3da5c. Chain 2 (Bitcoin): anchored in block 953958 (2026-06-16T14:52:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2713ba00-ce34-443a-a036-c0b20bd6a94d.json and https://artists.proofprofile.net/proofs/artist/2713ba00-ce34-443a-a036-c0b20bd6a94d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).