Robert Jack Stein (December 6, 1928 – July 31, 1980), known by his legalized stage name Bobby Van, was an actor and dancer, best known for his career on Broadway, in film musicals and television from
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 0x50a65df5dded743382f9d319169273a3b8fc04d9ea5ac3199ce7cd6b01f55ed2. Chain 2 (Bitcoin): anchored in block 953896 (2026-06-16T06:05:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0fce3056-7caa-45d8-93c3-a737b62450cd.json and https://artists.proofprofile.net/proofs/artist/0fce3056-7caa-45d8-93c3-a737b62450cd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).