thumb|upright|Count Carl Gustaf Mannerheim (1797–1854), the governor of the Vyborg Province, entomologist and the grandfather of Baron C. G. E. Mannerheim. Count (feminine: countess) is a historical t
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 0xe87682ecc6b1555ddba4f5a834856a638e0341a3f8a2436c75744357d89eac9a. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9264c0b8-9798-428f-9f34-952c50dd334f.json and https://artists.proofprofile.net/proofs/artist/9264c0b8-9798-428f-9f34-952c50dd334f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).