Ayoub Zaidane (Arabic: أيوب زيدان; born September 25, 1997), better known by his stage name Zamdane, is a Moroccan rapper and singer who performs primarily in French. Early life Zamdane was born an
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 0xa823a9793069c33ab7ca0ef8665d32b74bdc09a7f12080481ab2a1db98dc08d3. Chain 2 (Bitcoin): anchored in block 953936 (2026-06-16T11:24:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20a41c7f-d2d3-4f60-be79-e4e6504d22dd.json and https://artists.proofprofile.net/proofs/artist/20a41c7f-d2d3-4f60-be79-e4e6504d22dd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).