Huella is a 1940 Argentine film directed by Luis Moglia Barth during the Golden Age of Argentine cinema. Cast Enrique Muiño as Mariano Funes Fernando Ochoa Malisa Zini as Merceditas Ruiz Dani
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 0x35a55bee6f34023e507420164ff18e26c5040f066bb23cd7833585a25004517c. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/809f9b5c-ab17-4295-91ad-9c130ed70013.json and https://artists.proofprofile.net/proofs/artist/809f9b5c-ab17-4295-91ad-9c130ed70013.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).