Oscar Brashear (August 18, 1944 – July 7, 2023) was an American jazz trumpeterFeather, Leonard & Gitler, Ira The Biographical Encyclopedia of Jazz Oxford University Press: 2007 , Google books and sess
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 0x9f4182f1e11d085e01421cfce4f05921cb7a4a9ee39649dd3d9aaf590bf820af. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0eccb30b-ba29-490e-a1f7-57fc64fa17db.json and https://artists.proofprofile.net/proofs/artist/0eccb30b-ba29-490e-a1f7-57fc64fa17db.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).