KAZU (90.3 MHz) is a non-commercial FM radio station licensed to Pacific Grove, California, and serving the Monterey Bay area of the California Coast. It is a listener-supported public radio station
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 0x8537c28e80411edfa961dff567fd87671c2d4033f19a9b51042fccd0e8b8b317. Chain 2 (Bitcoin): anchored in block 954076 (2026-06-17T09:28:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7afc4539-bae0-4432-9f9e-34caea3f4bfb.json and https://artists.proofprofile.net/proofs/artist/7afc4539-bae0-4432-9f9e-34caea3f4bfb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).