Austin Percy Brice Jr. (March 25, 1923 – November 2020), nicknamed Big P, was an American jazz drummer. Brice was born in March 1923 in New York City. His professional career began around the end of
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 0xc75acdde549266482340d9eb927fda384d8845243bae36030bb82a861a7fb437. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8d816f1-603a-4d64-9ac7-41f3176da788.json and https://artists.proofprofile.net/proofs/artist/f8d816f1-603a-4d64-9ac7-41f3176da788.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.