Stuart Liddell MBE (born 12 January 1973) is a Scottish bagpipe player, playing Great Highland bagpipe. As well as competing in solo competitions, he is the Pipe major of the Inveraray and District Pi
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 0x0b81e0eecb1ec83b1b0e51b4e87b21dd58da7ecd93f0a5ba9817a971718a46c3. 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/8c321815-c3ef-4f8a-9b76-0a3a4fd0c743.json and https://artists.proofprofile.net/proofs/artist/8c321815-c3ef-4f8a-9b76-0a3a4fd0c743.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).