thumb|right|Chris Joris in the middle Chris Joris (born 30 November 1952, Mechelen) is a Belgian jazz percussionist, pianist and composer. He is the son of Jan Joris, an opera singer. Joris joined A
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 0x7a466d096809318b67d811f30841c511b47dec546aa1c2f33f8527ab86a9c83c. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/abacfdfc-6ad2-49bf-a3b2-d3a2b67c10c9.json and https://artists.proofprofile.net/proofs/artist/abacfdfc-6ad2-49bf-a3b2-d3a2b67c10c9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Live at the Jazz-Middelheim Festival & Stockholm '97