Vitu may refer to: Kenya Witu, a town on the Kenyan coast Witu Sultanate, a former sultanate on the Kenyan coast New Guinea Vitu Islands, near New Guinea Vitu language
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 0xff518f11385ba749bfbec4a6000079b3a2cd75b345534b04f8d78d106e18a7cc. 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/64fcd7b3-9f98-41f4-a72d-8e8b6677aa36.json and https://artists.proofprofile.net/proofs/artist/64fcd7b3-9f98-41f4-a72d-8e8b6677aa36.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).