Marizza (full title Marizza, called the Smuggler Madonna, ) is a 1922 silent German drama film directed by F. W. Murnau. The film is considered to be lost, though the Cineteca Nazionale film archive 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 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 0x37c4c747b7245994e35cba842fceef9084e75c585da90547a868c477832f0cfd. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6b9e812d-7cc7-4dce-b127-fec62dbf16c8.json and https://artists.proofprofile.net/proofs/artist/6b9e812d-7cc7-4dce-b127-fec62dbf16c8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).