Tres de febrero (3 February) is a notable date in Argentine history. On 3 February 1852 General Juan Manuel de Rosas, a great rival of President Domingo Faustino Sarmiento, was defeated. Sources W
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ead4bdabbad0d09670f3aa2f403d4d3c9a5e9cd1efb10232750c105513bf84e. Chain 2 (Bitcoin): anchored in block 954015 (2026-06-16T22:55:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35053ccc-8656-4e6b-8768-6b2d2180f690.json and https://artists.proofprofile.net/proofs/artist/35053ccc-8656-4e6b-8768-6b2d2180f690.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).