Irteassh is an all-girl A cappella band based in Karachi, Pakistan, which appeared in Coke Studio (Pakistani TV program) in Season 10. The band comprises 4 female vocalists Eman Pirzada, Ayesha Akbar
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 0xc15f545b0feb978848ba6de2dcba37027114d345e1d705f273a405715b331793. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8077e89-4b0e-4d8f-9c86-03518bf627bf.json and https://artists.proofprofile.net/proofs/artist/d8077e89-4b0e-4d8f-9c86-03518bf627bf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).