thumb|Thompson with Pentangle, in Amsterdam, 1969 Daniel Henry Edward Thompson (4 April 1939 – 23 September 2025) was an English multi-instrumentalist, best known as a double bassist. During a long m
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 0xd1a8278457e912dc829612a846c8eab48437a50872333e4a7f313433a3d58378. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/500b9028-d4b7-4604-80e2-36dc7a277100.json and https://artists.proofprofile.net/proofs/artist/500b9028-d4b7-4604-80e2-36dc7a277100.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Song of Joy for Christmas. An Album of English Carols