thumb| Adolphe Blanc (24 June 1828 – May 1885) was a French composer of chamber music. Blanc was born in Manosque, Alpes-de-Haute-Provence. At the age of 13 he was sent to study violin at the Paris
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 0x19b1e3abfd34b4f13add0cd189ba2d14a60ba192148c39132a6ac1d13404a294. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8fafb2d-aca5-44a3-8f12-8abf313658dd.json and https://artists.proofprofile.net/proofs/artist/e8fafb2d-aca5-44a3-8f12-8abf313658dd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Blanc: Clarinet Septet / Clarinet Trio / Wind Quintet No. 2
Adolphe Blanc: Septuor Trio Quintette no 2
Adolphe Blanc: String Quintets Nos. 3, 4 & 7