Nocturna may refer to: Nocturna (DC Comics), a comic book supervillainess Nocturna (film), a 2007 animated feature Nocturna: Granddaughter of Dracula, a 1979 disco film Nocturna (band), an Italian
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 0xe126898a691186ca736d8fd2e40012e87bd0d9305b51cdda5b222b3631201dac. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e4e4da4-e0cd-4f32-ae0c-02f86d7405df.json and https://artists.proofprofile.net/proofs/artist/4e4e4da4-e0cd-4f32-ae0c-02f86d7405df.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).