Nirmalendu Chowdhury () (27 July 1922 – 18 April 1981) was a Bengali musician, composer, lyricist and singer, who contributed significantly to the Folk music of Eastern India, particularly of Bengal 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22505460b34a69a88b6edcddd5afa6eae63c9b69e526a90e25621ea1f94a7b9e. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45850473-48f7-4378-bd1f-bdf94d592bf1.json and https://artists.proofprofile.net/proofs/artist/45850473-48f7-4378-bd1f-bdf94d592bf1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Natun Fashal (Original Motion Picture Soundtrack)
Kanchanmulya (Original Motion Picture Soundtrack)