AREX (Airport Railroad Express; ) is an airport rail link and commuter rail line in the Seoul Metropolitan Area of South Korea, linking Incheon International Airport and Gimpo International Airport wi
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 0x9d1371eee44fe188a2570b13388fd7dd3f86d36cc40c5db62c86b7299915e629. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c331bc73-07cd-42ce-8747-c127562927f0.json and https://artists.proofprofile.net/proofs/artist/c331bc73-07cd-42ce-8747-c127562927f0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).