Julio Florencio CortázarMontes-Bradley, Eduardo. "Cortázar sin barba". Editorial Debate. Random House Mondadori. p. 35, Madrid. 2005. (26 August 1914 – 12 February 1984; ) was an Argentine and natural
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 0x9ddb36139fb4018814d1e1490338fe673d65cd64b9b906d48184e78ef0ffb74e. Chain 2 (Bitcoin): anchored in block 953922 (2026-06-16T09:36:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b73eb04-45f6-429d-ae49-1c42b601acb9.json and https://artists.proofprofile.net/proofs/artist/1b73eb04-45f6-429d-ae49-1c42b601acb9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).