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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96f873877df6c400c831bc46de376b4d0e5219a5312df6e82197a02ab4f2abb. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0d6d616-5497-4137-96e4-11c8d7053033.json and https://artists.proofprofile.net/proofs/artist/b0d6d616-5497-4137-96e4-11c8d7053033.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sweeney Todd: The Demon Barber of Fleet Street (Original Broadway Cast Recording)
Prelude: The Ballad of Sweeney Todd: "Attend the Tale of Sweeney Todd"
Original Broadway Cast of Sweeney Todd: The Demon Barber of Fleet Street
Wigmaker Sequence: The Ballad of Sweeney Todd: "Sweeney'd Waited Too Long Before" / The Letter
The Ballad of Sweeney Todd: "Lift Your Razor High, Sweeney!"
Sweeney Todd: The Demon Barber of Fleet Street Original Broadway Cast Ensemble
The Ballad of Sweeney Todd: "Attend the Tale of Sweeney Todd"
Green Finch and Linnet Bird (From "Sweeney Todd: The Demon Barber of Fleet Street")
The Ballad of Sweeney Todd: "Sweeney Pondered and Sweeney Planned"
The Ballad of Sweeney Todd: "His Hands Were Quick, His Fingers Were Strong"
Company (Original Broadway Cast Recording)
Company - Original Broadway Cast: Company
Company - Original Broadway Cast: The Little Things You Do Together
Company - Original Broadway Cast: Sorry-Grateful
Company - Original Broadway Cast: You Could Drive a Person Crazy
Company - Original Broadway Cast: Have I Got a Girl for You
Company - Original Broadway Cast: Someone Is Waiting
Company - Original Broadway Cast: Another Hundred People
Company - Original Broadway Cast: Getting Married Today
Company - Original Broadway Cast: Side by Side by Side / What Would We Do Without You?
Company - Original Broadway Cast: Poor Baby
Company - Original Broadway Cast: Tick-Tock
Company - Original Broadway Cast: Barcelona
Company - Original Broadway Cast: The Ladies Who Lunch
Company - Original Broadway Cast: Being Alive
Company - Original Broadway Cast: Finale
Company - Original Broadway Cast: Being Alive (Bonus Track)
Into the Woods (Original Broadway Cast Recording)
Original Broadway Cast of Into the Woods
I Guess This Is Goodbye / Maybe They're Magic
A Very Nice Prince / First Midnight / Giants in the Sky
Kiss of the Spider Woman (Original Cast Recording)
Kiss of the Spider Woman Original Cast Recording Ensemble
Charlotte Sweet (Original Cast Recording)
And Now, Folks, Sit Tight : Please, No No!