thumb|right|220px|Charles-Louis Hanon Charles-Louis Hanon (2 July 181919 March 1900) was a French piano pedagogue and composer. He is best known for his work The Virtuoso Pianist in 60 Exercises, whic
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 0xb9e5e1df153a332f77f732a04b6c989b525ef3c673e5cbf0dad7353b3d1b58e1. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/493d164d-de63-40d6-9381-068d758a6f66.json and https://artists.proofprofile.net/proofs/artist/493d164d-de63-40d6-9381-068d758a6f66.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
全訳ハノンピアノ教本 [全音楽譜準拠] －監修：神野 明－
El Pianista Virtuoso en Sesenta Ejercicios (Versión Completa)
Hanon Exercise No. 60 (The Tremolo): from Hanon The Virtuoso Pianist