Martin Gantner is a German operatic baritone. He made his professional opera debut in Koblenz as Count Almaviva in The Marriage of Figaro. He soon after joined the roster of singers at the Deutsche Op
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 0x62e025431ee9d4e1e2a4d2098b50a372ec3b454794c6291a754b61ae9aca39dc. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3deff3b1-07a1-4b14-94de-af665ddaf16c.json and https://artists.proofprofile.net/proofs/artist/3deff3b1-07a1-4b14-94de-af665ddaf16c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).