James Alfred Conrad Cammack Jr. (born April 15, 1956) is an American jazz bassist from Cornwall, New York. Career For nearly thirty years, he played bass for Ahmad Jamal. His debut solo album, Both S
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 0x69166392ee455f70fbc23f7bfc82ee93825294441832d29ee6d73819e2c36f36. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a55c5063-8b98-4c6f-92cb-ce97c084298d.json and https://artists.proofprofile.net/proofs/artist/a55c5063-8b98-4c6f-92cb-ce97c084298d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).