Birri may refer to: Birri language, a central Sudanic language of the Central African Republic Fernando Birri (1925–2017), Argentine filmmaker Birri Gubba people, an Aboriginal Australian people of n
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 0xb740b1eda3cd5ca19e3c5e60cc13a6a220f55337a81b6563f8c3e18346235b6b. Chain 2 (Bitcoin): anchored in block 953928 (2026-06-16T10:21:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e9afb27-fec8-4d80-9acd-01b5ecc1ba02.json and https://artists.proofprofile.net/proofs/artist/1e9afb27-fec8-4d80-9acd-01b5ecc1ba02.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).