thumb|alt=Image of Lincoln being shot by Booth while sitting in a theater booth.|Depiction of the assassination of Abraham Lincoln shown in the presidential booth of Ford's Theatre. From left to right
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 0x57835626bd695e4a1e91cf6cf1dcd47277adafef040fedb95e93235e959eb6f9. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e60f9785-328c-4baf-9d8c-62533024713d.json and https://artists.proofprofile.net/proofs/artist/e60f9785-328c-4baf-9d8c-62533024713d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).