1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c6d72d8cd08aafc09f783607cf5b8758fa70a084a308a870aee1c1b834ab4c. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05cea096-b564-40e8-9af3-34aec42f5eeb.json and https://artists.proofprofile.net/proofs/artist/05cea096-b564-40e8-9af3-34aec42f5eeb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Who Do You Think You Are Kidding, Mr Hitler? (Theme from 'Dad's Army')
Who Do You Think You Are Kidding, Mr Hitler? - Theme from 'Dad's Army'
(We're Gonna Hang) The Washing On The Siegfried Line
(We're Gonna Hang) the Washing on the Siegfried Line
(We're Gonna Hang) The Washing on the Siegfried Line
Who Do You Think You Are Kidding, Mr Hitler? (Theme from Dad's Army)
If a Grey-Haired Lady Says How's Your Father
We're Gonna Hang out the Washing on the Siegfried Line
The Sport of Kings / Underneath the Arches
I Scream, You Scream, We All Scream for Ice Cream: Classic Songs For Children
Bless 'em All: Humorous Songs from World War II
Who Do You Think You Are Kidding, Mr Hitler? - Theme from Dad's Army