Brian Borcherdt (born August 31, 1976) is a Canadian musician who has been both a solo artist and a member of Burnt Black, Trephines, Hot Carl, By Divine Right, Holy Fuck, Lids, and Dusted. As a teen
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 0xc1f0b0d07ed2e24e223824c366978961a68e0a4a8bdf7bf5fa3ede49b2ed3efb. 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/eba02342-dedf-4f77-bf6f-5cfffcfa9883.json and https://artists.proofprofile.net/proofs/artist/eba02342-dedf-4f77-bf6f-5cfffcfa9883.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).