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 0xa1bb36fdfe2d846d21abe6cfc50649f78ee97ce1088f3c033ada51bc6c37c17e. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed88ed4d-dc34-4bff-b264-b7ef66d5fa43.json and https://artists.proofprofile.net/proofs/artist/ed88ed4d-dc34-4bff-b264-b7ef66d5fa43.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Well-tempered Clavier, Book I, BWV 846-851
A clear, clean piano sonata-V.A.Mozart Piano Sonata No.13-18
Healing the weary mind with a relaxed classic_ F.Mendelssohn, F.chopin