Pablo Larraín Matte (; born 19 August 1976) is a Chilean filmmaker. He is known for directing films such as The Club (2015), Neruda (2016), Jackie (2016), Spencer (2021), El Conde (2023), and Maria (2
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 0x2416bab2581ab478fb6aa5b236da4017adc36685d380dfd8adabf69b9cfd4a59. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcf61de2-7762-4154-bcad-a247c1a22f8a.json and https://artists.proofprofile.net/proofs/artist/bcf61de2-7762-4154-bcad-a247c1a22f8a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).