Greg Drummond (born 3 February 1989 in Forfar) is a Scottish curler from Stirling. He currently coaches the Ross Whyte rink. Career Drummond first appeared on the world stage as the alternate for the
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 0x29aeea242094c6be7f1d9446736f2b6befcda26cd430bea15ce23312611d3366. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/307c24eb-cecd-4161-bbf8-62a75dfdad64.json and https://artists.proofprofile.net/proofs/artist/307c24eb-cecd-4161-bbf8-62a75dfdad64.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.