Housni M'Kouboi (; born 15 December 1977), better known as Rohff and at times stylized as Roh2f, is a French rapper. Biography Born in Antananarivo, Madagascar, to a family of Comoran origin, he im
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 0x56f6ca406955cef460559132c83bb300718973a5c9c15d8032b74105a14f8558. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a672f2f3-6f50-4ad0-ada1-393e9a8d71f4.json and https://artists.proofprofile.net/proofs/artist/a672f2f3-6f50-4ad0-ada1-393e9a8d71f4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).