Hiwa Seyfizade (born November 5, 1997, in Tehran) is an Iranian classical music singer, Tombak player, theater actor and music teacher from Iran. Artistic life Hiwa Seyfizade was born on November 5,
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 0xa69a73accec4e59529a1e3c3ac1cb7cdf892b407c34ef13b929e12cfdbca37a3. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7dc6c0b5-fdb2-45b1-83be-f86d6d27a927.json and https://artists.proofprofile.net/proofs/artist/7dc6c0b5-fdb2-45b1-83be-f86d6d27a927.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).