Martin Bruns (25 November 1960 – 30 January 2026) was a Swiss baritone and music lecturer. Life and career Bruns was born in Weil am Rhein on 25 November 1960. During his school years, Martin Bruns
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 0x7f5f4aa289695f497a2dd13da9b8f438243ed2a1a0014be75343fd17462752d0. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/923e2807-539b-4653-bb54-28d2ffd3a713.json and https://artists.proofprofile.net/proofs/artist/923e2807-539b-4653-bb54-28d2ffd3a713.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).