Barf may refer to: Slang for vomit Barf (album), a 2000 album by Farhad Mehrad Barf (Lake District), a hill in Cumbria, England Bay Area Renters Federation, a political advocacy group in San Fran
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 0x1255c810344cc444eba471d2d5ae0b0e5fbd1ebb0cec8a85dc90bdf04dda96ca. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b129f0bb-2f24-483e-8309-8e293424fa5b.json and https://artists.proofprofile.net/proofs/artist/b129f0bb-2f24-483e-8309-8e293424fa5b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).