Michael Endres (born 1961) is a German/New Zealand pianist. He was a professor of piano from 1993 to 2004 at the Hochschule für Musik in Cologne, and from 2004 to 2009 at the Hochschule Hanns Eisler
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 0x7eb851c560ebadbbb9f65ee9f5b24c4a6d6d134f2ca43e4438f19ee7a1505276. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04c9832a-b297-4876-8433-f7c94ef1f25b.json and https://artists.proofprofile.net/proofs/artist/04c9832a-b297-4876-8433-f7c94ef1f25b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).