Charles Richard Cathcart (November 6, 1924 – November 8, 1993) was an American Dixieland trumpet player who was best known as a member of The Lawrence Welk Show in which he appeared from 1962 to 1968.
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 0x8cc59bd401d39f5a3611618a4250f016ac08bc9ea28dbf703cf3390b3bc4b66b. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/19e6a3bf-abcb-4c64-9281-f7c3b6395e1c.json and https://artists.proofprofile.net/proofs/artist/19e6a3bf-abcb-4c64-9281-f7c3b6395e1c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).