Jack Gregg is an American jazz bass player. He grew up in Memphis, Tennessee, where he started playing the bass at the age of 15. In 1961 he joined the Claude Thornhill Orchestra and toured with the b
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 0xa459eababb8ded56e3c0d632e6d40e80537156992f3a6be64e35cb2cb7bfd60f. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/998d8cdc-42a5-4bfb-908c-c0b60a82aa9a.json and https://artists.proofprofile.net/proofs/artist/998d8cdc-42a5-4bfb-908c-c0b60a82aa9a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).