Mithat Fenmen (January 24, 1916 – October 19, 1982) was a Turkish pianist, composer and music teacher. Education Mithat Fenmen studied at the Istanbul Conservatory from 1929. In 1939, he went to th
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 0x5f604fe571dee5639ff6b934f19a5d18e3a484fde652e0058805ddb0926fe84e. Chain 2 (Bitcoin): anchored in block 953885 (2026-06-16T04:12:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b34dcca-d20b-4292-8744-0772706b5122.json and https://artists.proofprofile.net/proofs/artist/0b34dcca-d20b-4292-8744-0772706b5122.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).