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 0x665389172ec2e5f9fea44bbee762771aa1914122c5849987a18a2c81bd9a1b4f. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/014c2306-b260-4f3b-be4e-b57339743c81.json and https://artists.proofprofile.net/proofs/artist/014c2306-b260-4f3b-be4e-b57339743c81.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Doyle, A.C.: Adventures of Sherlock Holmes (The), Vol. 2 (Unabridged)
Opera Explained: Rossini - The Barber of Seville
Opera Explained: Puccini - Madama Butterfly
Opera Explained: BIZET - Carmen (Smillie)
Opera Explained: Mozart - The Magic Flute (Smillie)
Opera Explained: Wagner, R. - The Flying Dutchman
Opera Explained: VERDI - La traviata (Smillie)
Doyle, A.C.: Adventures of Sherlock Holmes (The), Vol. 5 (Unabridged)
Opera Explained: Mozart - Cosi Fan Tutte (Smillie)
Doyle, A.C.: Adventures of Sherlock Holmes (The), Vol. 6 (Unabridged)
Opera Explained: Mozart - The Marriage of Figaro
Opera Explained: Donizetti - L'Elisir D'Amore (Smillie)
Opera Explained: STRAUSS - Die Fledermaus (Smillie)
Caruso: Enrico Caruso - A Life in Words and Music
Opera Explained: Verdi - Il Trovatore (Smillie)
Opera Explained: Mozart - Don Giovanni (Smillie)
Opera Explained: MASCAGNI - Cavalleria rusticana (Smillie)
Opera Explained: Gluck - Orfeo Ed Euridice (Smillie)
Doyle, A.C.: Return of Sherlock Holmes (The), Vol. 2 (Unabridged)
Opera Explained: Leoncavallo - Pagliacci (Smillie)
Opera Explained: Rossini - Tancredi (Smillie)
Opera Explained: Puccini - Turandot (Smillie)
Opera Explained: Verdi - Falstaff (Smillie)
Opera Explained: Gilbert and Sullivan (Smillie)
Opera Explained: Debussy - Pelleas Et Melisande (Smillie)
Opera Explained: Massenet - Werther (Smillie)
Opera Explained: Monteverdi - Orfeo (Smillie)
Opera Explained: Bellini - La Sonnambula (Smillie)