Brunch () is a meal taken sometime in the late morning or early afternoon – some sources mention 11am–2pm, though modern brunch often extends as late as 3pm. The word brunch is a portmanteau of breakf
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 0xe37c02fa275d342de77f1e257b0d419b15b1c4c5c00f9a46fe7241faebf95577. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b547e9f8-0f9b-4306-baa6-77498f1e7f89.json and https://artists.proofprofile.net/proofs/artist/b547e9f8-0f9b-4306-baa6-77498f1e7f89.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).