EK, Ek or ek may refer to: Businesses and organizations Eastern Kentucky Railway (with reporting mark EK), now-defunct railway Eastman Kodak (formerly with NYSE ticker symbol EK), US-based photogra
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 0x292dfa859818ba2d6d9fea7e8d9a4b7043acc20a92927a9d3e0117d56975e0eb. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4fd54f3-6d54-4243-b001-e94d9b24ee8e.json and https://artists.proofprofile.net/proofs/artist/b4fd54f3-6d54-4243-b001-e94d9b24ee8e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).