Dupree Bolton (3 March 1929 – 5 June 1993) was a jazz trumpeter from Oklahoma City, Oklahoma. He is known primarily for his appearance as a backing musician on two hard bop jazz albums, the first led
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 0x891d942a2064e976fc9e2e366480c4bdff8cca43d13e208e5d03f29d02b58ba6. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2a48ca7-e2a5-4809-9909-616d28a6e743.json and https://artists.proofprofile.net/proofs/artist/e2a48ca7-e2a5-4809-9909-616d28a6e743.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).