Louise-Marie Simon (30 November 1903 – 7 March 1990), professionally known as Claude Arrieu, was a French composer, pedagogue, and music producer. Arrieu wrote hundreds of works in various formats, i
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 0xeef73785a1425073aa24472cd10c42099b4fecc80ed00fb8f4393ee69942d81d. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3a7b105-2990-4602-a982-13329c0eb0b3.json and https://artists.proofprofile.net/proofs/artist/e3a7b105-2990-4602-a982-13329c0eb0b3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Her Sonic Realm - The Creative Legacy of Women in Music