KEST (1450 AM) is a brokered-time radio station in San Francisco, California. Most of the station's programming is in Asian languages, including Mandarin and Cantonese. It also airs some South Asian,
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 0xa68a4d9bc2c694c34e854b3b608c05a74b6bfecb731e2dbe9def85ea7fc68835. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbe124b3-eca9-4b43-9393-67e16c73773d.json and https://artists.proofprofile.net/proofs/artist/cbe124b3-eca9-4b43-9393-67e16c73773d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).