SNUB or Stop Norwich UrBanisation is a non-profit organisation based around Norwich, United Kingdom, whose aim is to stop the urbanisation of Norwich and its surrounding villages, such as Rackheath, S
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 0x509dd038423faf8215d602a37ca2f850b19562848f859dcb70339d900dbebb45. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b0f6830-85e8-4f23-a311-44f52e9c53f0.json and https://artists.proofprofile.net/proofs/artist/4b0f6830-85e8-4f23-a311-44f52e9c53f0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).