IFB may refer to: Illinois Farm Bureau Independent Fundamentalist Baptist, another name for Independent Baptist Christian congregations (Baptist congregations not affiliated with a denomination) In
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 0x6a35c232ba3e1dd7cb6f6361ae2357356adfbd22b0ecac0417ad930452ebca7c. 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/c9c160cb-6b6e-425c-93f8-02471a39bd91.json and https://artists.proofprofile.net/proofs/artist/c9c160cb-6b6e-425c-93f8-02471a39bd91.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).