Leutnant Wolfgang Güttler was a World War I flying ace credited with eight aerial victories. He would score the first four while flying with Jagdstaffel 24, and the last four while flying as commander
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 0xdd559dadd3c650470d49b09021d64294901bc13813d7cc11ec93ec91686695a7. 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/1ef44b34-cbbd-4de9-aa2f-e8be3388b169.json and https://artists.proofprofile.net/proofs/artist/1ef44b34-cbbd-4de9-aa2f-e8be3388b169.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Schubert, Paganini, Bottessini, Massenet & Fauré: Works for Double Bass & Piano