Leda Atomica is an oil painting by Salvador Dalí, from 1949. It is exhibited in the Dalí Theatre and Museum in Figueres. Description The picture depicts Leda, the mythological queen of Sparta, with t
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 0x39e84b015af8346a6c2c63ec74a05674b1a79162dab5558f12a06ed54c2ac897. 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/90378317-22cf-4dff-8214-f98148c30dfa.json and https://artists.proofprofile.net/proofs/artist/90378317-22cf-4dff-8214-f98148c30dfa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).