Coastal City () is a shopping and office complex in Nanshan District, Shenzhen, China. Located in the central business district of Nanshan, it occupies an entire city block bounded by Binhai, Nanhai,
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 0x6e800478e72b44667e34dfe55c1be0a11cc8a923757f47d468204fa4833e5db1. Chain 2 (Bitcoin): anchored in block 954028 (2026-06-17T01:08:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39a617ee-eaf3-4ded-9290-347184e6def6.json and https://artists.proofprofile.net/proofs/artist/39a617ee-eaf3-4ded-9290-347184e6def6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).