thumb|265px|Jim Black performing in Aarhus, Denmark thumb|265px|Jim Black in Denmark 2018 Jim Black is an American jazz drummer who has performed with Tim Berne and Dave Douglas. He attended Berklee
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 0x42b53291329bbcf1fbf30ce25b8c096f96630e9852e55f699a7a4348a97b83ee. Chain 2 (Bitcoin): anchored in block 953691 (2026-06-14T20:39:17Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a8bbd59-c5fc-4323-ac8f-36079913d204.json and https://artists.proofprofile.net/proofs/artist/6a8bbd59-c5fc-4323-ac8f-36079913d204.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).