Stig or STIG may refer to: People Stig (given name) Nickname of Robert Stigwood (1934–2016), musical act manager Arts and entertainment The Stig, a masked racing driver on the UK television show
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 0xd8f2b9cc15ce31d68b74aa2b488758a585df5d402e6b0879abb380131b078dab. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3c553af-65bd-4e49-a7ab-ce69780f8dd8.json and https://artists.proofprofile.net/proofs/artist/e3c553af-65bd-4e49-a7ab-ce69780f8dd8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).