thumb|Maria Mueller standing at the stage door of the Metropolitan Opera House, New York City, 1925 Maria Müller (29 January 1889 – 13 March 1958Bayreuth Registry Office, Death Register 252/1958) was
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 0x2ad99bcdb4c37c6e32c2b16164539ce0e03a273867774bee06f89f1819283919. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da4bdbf1-df81-4d55-9a25-ca540b95144f.json and https://artists.proofprofile.net/proofs/artist/da4bdbf1-df81-4d55-9a25-ca540b95144f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).