The Fred Frith Trio is a San Francisco Bay Area based experimental music and free improvising group featuring Fred Frith, Jason Hoopes and Jordan Glenn. They were formed in Oakland, California in 2013
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 0x416e9eeeeb4ab889ea07e3d186bc10f42f98fe578cb6378178b7ed27e957c20b. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ae3b3d6-4b13-4645-b622-2e75b9516994.json and https://artists.proofprofile.net/proofs/artist/2ae3b3d6-4b13-4645-b622-2e75b9516994.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).