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 0x482b729b75f6cc8fed4842ec02443771f0456d90963eb23c4f2bb5e5de1df5e9. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d09b5859-dcf1-4391-9e6c-e6687d40e9f9.json and https://artists.proofprofile.net/proofs/artist/d09b5859-dcf1-4391-9e6c-e6687d40e9f9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chopin: Nocturne in E-Flat Major, Op. 9 No. 2
Debussy: Arabesque, L. 66: No. 1, Andantino con moto
Bach: French Suite No. 2 in C Minor, BWV 813
Sheep May Safely Graze (Arr. for Piano by Egon Petri)