Earl Thomas Watkins, Jr. (January 29, 1920, in San Francisco – July 1, 2007, in San Francisco) was an American jazz drummer. Watkins was a percussionist in a United States Navy band during World War
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 0x6111d4aebd17273fe57b211904d8b5a0e9c30b350a0ca738a035037d67c234fc. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5c94cf6-c267-4c7f-b522-943c5d92cdc5.json and https://artists.proofprofile.net/proofs/artist/b5c94cf6-c267-4c7f-b522-943c5d92cdc5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).