Gloria Cheng is an American pianist who won a Grammy Award for her 2008 Piano Music of Esa-Pekka Salonen, Steven Stucky, and Witold Lutosławski and a nomination for The Edge of Light: Messiaen/Saariah
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 0x6cb69e56b2052028368b27178cae94273a0a98afd7d132f1edc6b7a0e979b419. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23b76688-1e71-482e-8abf-133f30b366ef.json and https://artists.proofprofile.net/proofs/artist/23b76688-1e71-482e-8abf-133f30b366ef.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Piano Music by Salonen, Stucky and Lutosławski
Montage: Great Film Composers and the Piano
Sonata in Darkness (from The Batman) [Live]
Montage: Great Film Composers and the Piano (Tenth Anniversary Edition)