Keith Emrey Carey (March 5, 1920 – February 15, 1999) was an American professional basketball player. He played for the Flint Dow A.C.'s in the National Basketball League during the 1947–48 season and
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 0x76648fe384c04f5d00fb5b93ded2511ba7c3cf01a8fe482096086128efc09433. Chain 2 (Bitcoin): anchored in block 954047 (2026-06-17T04:56:08Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40e314ed-0765-4a0a-94d2-f4a2f43916a8.json and https://artists.proofprofile.net/proofs/artist/40e314ed-0765-4a0a-94d2-f4a2f43916a8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).