thumb|upright=1.2|Colchester Overpass, the site of the 1970s urban legend of the "Bunny Man", said to be a man or ghost in a rabbit costume who attacked people in the area An urban legend (sometimes
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd928797c19edf1b02fc3fffa2f7f8eb67739b438c372e71b6e42c29294b7c2. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a07ab671-7690-414b-aea4-548c25e9d1c2.json and https://artists.proofprofile.net/proofs/artist/a07ab671-7690-414b-aea4-548c25e9d1c2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).