Alfred Muff (born 31 May 1949) is a Swiss operatic bass-baritone. Life and career Born in Lucerne, Muff studied at the Lucerne conservatory until he was introduced by its director Rudolf Baumgartne
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c65f974a8f842bfbb4c7acbbfd87dbd079cbf375bff2d1cdd445b1271eee84. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2da4e6c0-7406-4053-a60c-3307208e59ff.json and https://artists.proofprofile.net/proofs/artist/2da4e6c0-7406-4053-a60c-3307208e59ff.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).