thumb|500px|View of Uji River from Uji Bridge thumb|This is the Kisen Bridge, which connects Uji to a small peninsula park called 宇治公園 (Uji Park) in the Uji-Gawa River thumb|Manpuku-ji thumb|Ujigami
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 0xb4cdc810cf3b8dc1f05f0e348b131c81f190f412fc7b533423035a6dc6983311. Chain 2 (Bitcoin): anchored in block 953991 (2026-06-16T18:47:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f4876d0-7762-477f-8480-48e9bab195ae.json and https://artists.proofprofile.net/proofs/artist/2f4876d0-7762-477f-8480-48e9bab195ae.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).