Ewart Everton Brown (born 31 March 1968), better known by his stage name Mad Cobra or simply Cobra, is a Jamaican dancehall musician.Huey, Steve "[ Mad Cobra Biography]", AllMusic, retrieved 2010-01-3
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 0xecb7bb7019e686eade91cbce14edcea052619741decfae89f305e8ecfcae6430. Chain 2 (Bitcoin): anchored in block 953958 (2026-06-16T14:52:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/26b82a9a-8610-4afd-8e17-980ab427a2d2.json and https://artists.proofprofile.net/proofs/artist/26b82a9a-8610-4afd-8e17-980ab427a2d2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).