upright=1.35|thumb|Michael V Kalaphates (c. 1015–1042) Year 1041 (MXLI) was a common year starting on Thursday of the Julian calendar. Events By place Byzantine Empire December 10 – Emperor Mi
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 0x8772a287c4dabf3920f62c69910c6a2ca020277b831d9e9a4e6eff8b1edcf46e. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/173ca736-0498-4397-bf6e-34f552b88d71.json and https://artists.proofprofile.net/proofs/artist/173ca736-0498-4397-bf6e-34f552b88d71.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).