Washington Carrasco Fernández (9 June 1922 – 5 April 2021) was a Chilean military officer, who held the rank of lieutenant general in the Chilean Army. He served as Minister of National Defense of Ch
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 0xb2d90834d9e3f4b8e27ca8aaaa209a81fa7c0c61a4fae01fa5e665f49011b01d. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2bd0e26-da29-4a28-8f2d-1226cdfd0444.json and https://artists.proofprofile.net/proofs/artist/e2bd0e26-da29-4a28-8f2d-1226cdfd0444.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).