Skywalker Sound (formerly known as Sprocket Systems) is the American sound effects, sound editing, sound design, sound mixing and music recording division of Lucasfilm. Founded in 1975, the company's
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 0xea8e03fa731cbe65ea2aad9192a539c093c2a6e30b337e63a76844e8dc4f860c. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd87ce5f-2e27-48e1-be31-731504124ffa.json and https://artists.proofprofile.net/proofs/artist/dd87ce5f-2e27-48e1-be31-731504124ffa.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.