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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74b357897d6cd02a7c01b067ae0da7a2fe74fc15aa95b4e1e6745fe361fac50. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a846f4c6-3aac-4e4c-8d45-ee52f1b76002.json and https://artists.proofprofile.net/proofs/artist/a846f4c6-3aac-4e4c-8d45-ee52f1b76002.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Diamonds (An Acoustic Tribute to Rihanna)
Addicted to You (An Acoustic Tribute to Avicii)
Hard Out Here (An Acoustic Tribute to Lily Allen)
Dark Horse (An Acoustic Tribute to Katy Perry)
Bang Bang (A D&B Tribute to Jessie J, Ariana Grande & Nicki Minaj)