Lutfor Hasan is a Bangladeshi singer-songwriter, musician, and author. He has released a total of seven full-length solo studio-albums till now. His first solo album named Ghuri Tumi Kar Akashe Uro wa
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f8459d07bfce4c8dd5804d6b05ded8b5b54560af97ac4f1c23fe711febd11a. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4650fd5-1e64-45fe-a5bb-0e8ed7d526a4.json and https://artists.proofprofile.net/proofs/artist/b4650fd5-1e64-45fe-a5bb-0e8ed7d526a4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).