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 0xa582bc45d54ca15ad197bb103f4c5e4056ee372884123c4b224e0c69f163c503. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4412096-5f23-4c85-a0ca-cb541ec511c5.json and https://artists.proofprofile.net/proofs/artist/f4412096-5f23-4c85-a0ca-cb541ec511c5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Paper: Precision Array to Probe the Epoch of Reionization
The Best of RELEFORD: 20th Century Masters (Millennium Collection)