Maqbool Ahmed Sabri (12 October 1945 – 21 September 2011) was a Pakistani qawwali singer and a prominent member of the Sabri Brothers, one of the greatest qawwali groups of all times which belonged to
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 0x711ba586df227e3f414b3f2037242843cf9ccf93c16625e9ae94f9c93cd71a4c. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a142d2b3-0bb1-4491-a353-a562c425bf47.json and https://artists.proofprofile.net/proofs/artist/a142d2b3-0bb1-4491-a353-a562c425bf47.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tere Ghunghroo Toot Gaye To Kya (Ghazals)