Pandit Devabrata (Debu) Chaudhuri ((); 30 May 1935 – 1 May 2021) was an Indian sitarist and teacher. He was conferred the Padmabhushan and Padma Shri awards. He was the writer of six books, composer o
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 0xb81abc77a622f6869aa2da41cf5414c47b0ed9ee06a9ac3bd6037f2da394d647. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9b074ae-0446-473e-8d75-12ef38e1a266.json and https://artists.proofprofile.net/proofs/artist/a9b074ae-0446-473e-8d75-12ef38e1a266.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).