thumb|Matthias Koeberlin in 2012 Matthias Koeberlin (born 28 March 1974, Mainz) is a German actor and reciter. His work includes the British-German co-production The Sinking of the Laconia (2010, UK p
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 0x2466f01fa55a3bdc9774b925b8416882ca11b933a53f2804c6504335dd70b158. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2ccc40a-14eb-4610-b831-a48993a6ec8f.json and https://artists.proofprofile.net/proofs/artist/d2ccc40a-14eb-4610-b831-a48993a6ec8f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).