Stuart Bruce Greenwood (born August 12, 1956) is a Canadian actor and producer. He has starred in five films by Canadian filmmaker Atom Egoyan and has been nominated for three Canadian Screen Awards,
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65c368b67d784000836963fb24419eea2c979a717eb51594f245b82833d7be4. 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/3f80af36-803a-4b19-898f-1e610f325032.json and https://artists.proofprofile.net/proofs/artist/3f80af36-803a-4b19-898f-1e610f325032.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).