Nonsuch Park is a public park between Stoneleigh, Cheam, and Ewell in the borough of Epsom and Ewell in Surrey, England. It borders the London Borough of Sutton. It is the last surviving part of the
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 0xbb21d4c41189f7931cd1a99a9e5c662398ae38b30c5d7a0e22c16ddd3a2a6733. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/984de7b3-00e5-485e-adcc-8e4d6b020208.json and https://artists.proofprofile.net/proofs/artist/984de7b3-00e5-485e-adcc-8e4d6b020208.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).