thumb|Jo Thomas in 2012 at Prix Ars Electronica, Linz, Austria Jo Thomas (born 1972) is a composer, sound artist, producer, and performer of electronic music based in London. She works primarily with
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 0x95b929db5a0fab6cf6e1090216c648ea9a710bf9370b2e9b5a865a23de1b7d48. 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/de6f4fba-0eee-40cd-8598-2717befc2044.json and https://artists.proofprofile.net/proofs/artist/de6f4fba-0eee-40cd-8598-2717befc2044.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).