Keish ( – July 11, 1916), also known as James Mason and by the nickname Skookum Jim Mason, was a member of the Tagish First Nation in what became the Yukon Territory of Canada. He was born near Bennet
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 0xeaf651db57e29a7490aed390c2c6c4dbc475c777d1156bad7afb13595333c952. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0238bcfd-9075-4eb1-a0a3-ef0c26ee0d14.json and https://artists.proofprofile.net/proofs/artist/0238bcfd-9075-4eb1-a0a3-ef0c26ee0d14.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).