__NOTOC__ Matt Trobbiani is an Australian video game developer and voice actor who developed the indie video game Hacknet (2015). His experience as a developer was the subject of a profile in Rollin
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 0x4b3bfdf75f500ff0e8584975af9d2505e418a8e1c6bb02bb1608974a9f6fa7d0. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f11bca97-0ba9-4794-9db5-5e84f77fae20.json and https://artists.proofprofile.net/proofs/artist/f11bca97-0ba9-4794-9db5-5e84f77fae20.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).