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 0xb895a6a2ca114a53f50384bb4e772ca769b7424c0ff6b35daeec695f427d8faa. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08fe22b4-1db9-410a-9e31-aead478d8290.json and https://artists.proofprofile.net/proofs/artist/08fe22b4-1db9-410a-9e31-aead478d8290.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kurt Schindler (Live Looping at the Brew Pub 12-31-2016)
Kurt Briggs Schindler (Live at the Fort Christian Brew Pub 2006)