Alfa may refer to: Businesses and organisations Broadcasting Alfa Radio, a Macedonian radio station XHFAJ-FM, a Mexico City radio station better known as Alfa 91.3 Alfa TV (Cypriot TV channel), a
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 0x1987c0c1ab83584fb5b35f9a7f4477d65bac19f69a9495eab65ba0bd01c79473. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90ba6889-d41a-4f45-9b44-93d7d4e32a30.json and https://artists.proofprofile.net/proofs/artist/90ba6889-d41a-4f45-9b44-93d7d4e32a30.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).