Oussama Al Rahbani (; born 9 December 1965) is a Lebanese musician and composer. He is the son of the Lebanese composer, musician, and poet, Mansour Rahbani. Oussama completed his education at Collèg
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 0xa08f676df68c3f6675f268592c5f4a0fa7cc49d849de2654e6d9cc8993d61ef5. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9dfc9034-2e5c-424a-b2f1-8f772fc7d15d.json and https://artists.proofprofile.net/proofs/artist/9dfc9034-2e5c-424a-b2f1-8f772fc7d15d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Oussama Rahbani with Hiba Tawaji & Wadih Abi Raad (Live)
Don Quixote (Highlights from the Musical Play)
Al Mawt El Kadem Ila Shark (Death Heading Towards East)