Keith Grayson (August 14, 1965 – April 17, 2022), known professionally as DJ Kay Slay, was an American disc jockey (DJ) from Manhattan, New York. He is referred to by The New York Times as "Hip Hop's
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 0xf59263e9493ad58c712c63ba4c3894b245fb5ea78c7835736e7dc6371114732d. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6722ba2e-acf8-4318-92a0-f3467a1c258b.json and https://artists.proofprofile.net/proofs/artist/6722ba2e-acf8-4318-92a0-f3467a1c258b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).