Abolhasan Saba (; 15 April 1902 – 19 December 1957) was a renowned Iranian composer, violinist, and setar player. Biography thumb|left|Manoochehr Sadeghi (left), Saba (middle), Faramarz Payvar (right
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 0x0c49a9b69bdb88981abe64a92f50443bf868cdecf03b0a53dd53c0235891a314. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54c7eec9-78a1-4c67-9de1-963bb30b8800.json and https://artists.proofprofile.net/proofs/artist/54c7eec9-78a1-4c67-9de1-963bb30b8800.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).