thumb|The Lawn at the University of Virginia, facing south thumb|The lawn of a small summerhouse thumb|A croquet lawn at a club in Edinburgh, Scotland thumb|San Francisco Botanical Garden lawn, Unite
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 0x15935c361a7a19ec90da1da7eab2b0c5ae2297a14edb07205463efdc84d1b5cc. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5a43c91-5812-4cf1-afae-4ea79d319670.json and https://artists.proofprofile.net/proofs/artist/a5a43c91-5812-4cf1-afae-4ea79d319670.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).