Jamel may refer to: Jamel, Tunisia, a city in Tunisia Jamel, Germany, a village in Germany People with the given name Jamel Jamel Aït Ben Idir (born 1984) French-Moroccan footballer Jamel Dean (
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 0xfffb8f415dca0865878abddbf79783ab0e410dc895f30bb86047b24de1cd3aa5. Chain 2 (Bitcoin): anchored in block 953864 (2026-06-16T00:30:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/041064d8-2615-4fa3-8738-6ca68db4fce0.json and https://artists.proofprofile.net/proofs/artist/041064d8-2615-4fa3-8738-6ca68db4fce0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).