__NOTOC__ Lissa may refer to: Places the old Venetian name for the Adriatic island of Vis the German name for the town of Leszno in Poland the German name for the town of Lysá nad Labem in the Cze
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 0x90a9b82ad13349d6ad7d35aa8e2ec4bc87732c218413b86b6ff8bfce7450d878. 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/88f1a15f-2eed-412f-b1a9-455921e3c0fc.json and https://artists.proofprofile.net/proofs/artist/88f1a15f-2eed-412f-b1a9-455921e3c0fc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).