Robert J. Sherwood Jr. (May 30, 1914 – January 23, 1981) was an American guitarist, trumpeter, bandleader, actor and radio host. Early years Sherwood's parents were Bob and Gail Sherwood. When they
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 0xcc29d50c1f35d7ebefd8c4dee4b9265232edd356b1dadac6bab9da1869647709. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9fe6620-bf5b-4308-8509-001ec0ddd5cf.json and https://artists.proofprofile.net/proofs/artist/c9fe6620-bf5b-4308-8509-001ec0ddd5cf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).