Farewell Spit () is a narrow sand spit at the northern end of the Golden Bay, in the South Island of New Zealand. The spit includes around of stable land and another of mobile sand spit running east
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 0x67b59443f75bde15d20457747e6c074ac0dddafb5e66e52246cd486e7fbf27cb. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cce1f3ff-c72c-4e11-9677-e198c772be21.json and https://artists.proofprofile.net/proofs/artist/cce1f3ff-c72c-4e11-9677-e198c772be21.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).