thumb|Natural color X-ray photogram of a wine scene. Note the edges of hollow cylinders as compared to the solid candle. thumb|William Coolidge explains medical imaging and X-rays. An X-ray is a for
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 0x7b9af83a4ed704d4f5105064328f09f87448a38d6533bf0669f000fc3040fbed. Chain 2 (Bitcoin): anchored in block 953871 (2026-06-16T01:46:03Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07a35cf6-c91b-4426-bb66-fc4efb0bf048.json and https://artists.proofprofile.net/proofs/artist/07a35cf6-c91b-4426-bb66-fc4efb0bf048.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).