upright=1.35|thumb|The murder of Romanos III in his bath. Year 1034 (MXXXIV) was a common year starting on Tuesday of the Julian calendar. Events By place Byzantine Empire April 11 – Emperor R
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0791fea77a4088707d1808673aad31f0a0ab0c99aa4d0855ceb95ecc143b8b6. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eebacd9e-a678-4b14-be42-f77f07819daf.json and https://artists.proofprofile.net/proofs/artist/eebacd9e-a678-4b14-be42-f77f07819daf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).