Smartzee (born 1980) is a French rapper and singer born in Benin. Biography Smartzee became known to the general public due to his feature on the single "Et c’est parti" of French R&B singer Nâdiya.
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 0x0c958066b82173c8aa8a99df6f24679826abbaf9eaa8042aa9e2e32b954197ea. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e956dc6-e794-4a47-8758-61e4c66b2e38.json and https://artists.proofprofile.net/proofs/artist/3e956dc6-e794-4a47-8758-61e4c66b2e38.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).