Natalie Leota Henderson Hinderas (June 15, 1927 – July 22, 1987) was an American pianist, composer and professor at Pennsylvania's Temple University. Hinderas was born in Oberlin, Ohio to a musical f
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 0xfedffe380fb393561fa77ea339eb2650a963fab723146a3b4cbf4c8b74218b8e. 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/6029d5a4-6527-433a-9bfe-0b1cbc97eb78.json and https://artists.proofprofile.net/proofs/artist/6029d5a4-6527-433a-9bfe-0b1cbc97eb78.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piano Music by African-American Composers