The Hyderabad Brothers, D. Raghavachari (b 1952) and D. Seshachari (1956-2024), were a Carnatic music singing duo. They were one among the most popular duo vocalists in Indian Classical Carnatic music
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 0x5e585a115b0ece02ce263208f87a9d7a82a68a9832c573e7d36304da0a29a19c. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d21d0530-0ebe-45d3-95d7-58a4dc9fb768.json and https://artists.proofprofile.net/proofs/artist/d21d0530-0ebe-45d3-95d7-58a4dc9fb768.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hyderabad Brothers, Vol. 2 (Live at Sree Rama Seva Mandali, Bangalore)
Hyderabad Brothers, Vol. 1 (Live at Sree Rama Seva Mandali, Bangalore)
Chidanandam - Hyderabad Brothers (Live at Chidambaram)