Christopher Darnell Cook (born October 5, 1988), professionally known as Sonaro, is an American music producer from Far Rockaway, New York. He is perhaps best known for producing songs for Brooklyn-br
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 0xa91d920d91ac2e770c13bde465ed0e12847d49059bc8904c1da5453eb472280f. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c92b52a8-63fb-451f-8b54-4c035157bc84.json and https://artists.proofprofile.net/proofs/artist/c92b52a8-63fb-451f-8b54-4c035157bc84.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).