1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x27619b11ab5c995bca3c80e5bc6865d5960c43e1081473b1e8bbd14c61b9ab79. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a522273-b502-4b2c-86fe-f2662a58b7ef.json and https://artists.proofprofile.net/proofs/artist/0a522273-b502-4b2c-86fe-f2662a58b7ef.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Swing Low, Sweet Chariot: Negro Spiritual
Ev'ry Time I Feel De Spirit: Negro Spiritual
Eine Nacht In Venedig: Love Can Be Dreamed & Mine Alone
Largo Al Factotum (From the Barber of Seville)
Zazà: Zazà piccolo zingera (Recorded 1939)
La Traviata: Di Provenza il mar, il suol (Recorded 1939)
Andrea Chénier: Nemico della Patria (Recorded 1939)
Il barbiere di Siviglia: Largo al factotum (Recorded 1939)
Otello: Credo in un Dio crudel (Recorded 1939)
Hérodiade: Vision Fugitive (Recorded 1934)
Hérodiade: C’en est fait...Salome demande (Recorded 1939)
Hamlet: O vin dissipe la tristesse (Recorded 1934)
In questa tombe oscura, WoO 133 (Recorded 1939)
Tannhäuser, WWV. 70: O du, mein holder Abenstern (Recorded 1932)
2 Songs after Heine, H.27: No. 2, E'en as a Lovely Flower (Recorded 1942)
Timeless Voices: John Charles Thomas Vol 2
Timeless Voices: John Charles Thomas Vol 1
Andrea Chénier: Nemico della patria (Recorded 1939)
Legendary Baritones (Recorded 1905-1941)
Hamlet: Act II - O Vin, Dissipe La Tristesse
Hamlet: Act II - Ô Vin Dissipe (Brindisi)
Jenkins, Florence Foster: Murder On the High Cs (1937-1951)