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 0xe3025975cbafdefb53a1a342759a1c7696335760dded88bfd775de1eb3fe3b01. Chain 2 (Bitcoin): anchored in block 953869 (2026-06-16T01:20:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06a5727e-dfd9-4dbb-b60e-97c8c00e5623.json and https://artists.proofprofile.net/proofs/artist/06a5727e-dfd9-4dbb-b60e-97c8c00e5623.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Poulenc, Milhaud, Auric, Mower and others, Original works for piccolo and piano
The Birds, Original Works for Piccolo and Piano