William H. Chapman Nyaho (surname Chapman Nyaho; b. Washington, D.C., 1958) is an American concert pianist specializing in solo piano music by composers from Africa and the African diaspora. He gradu
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 0xe9f1eee0e0d5ef1dca9c219a46eb95cdd7e3312993f222414e68baa064354141. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0dd6681-6b75-415a-835b-79c88b6fb618.json and https://artists.proofprofile.net/proofs/artist/c0dd6681-6b75-415a-835b-79c88b6fb618.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Senku - Piano Music by Composers of African Descent, Vol. 1
Asa - Piano Music by Composers of African Descent, Vol. 2
Kete - Piano Music of Africa and the African Diaspora
Five By Four - Music for Piano Duo by Alberga, Grantham, Kerr, Sung and Piazzolla
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ff8cf273c072a6c22b0034bcade6111e2a9b4dd7291b1d7d775131e1959baf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBN3Q2403517.