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Base Build launches Verify Onchain, leveraging on-chain identity verification to address the problem of airdrop sybil attacks.

1 hours ago

According to official announcements, Base Build has launched Base Verify Onchain, a tool designed to address Sybil attack issues in blockchain ecosystems. The feature is now live on the Base Sepolia testnet, allowing developers to implement the "one real user, one claim" rule in smart contracts. Base Build noted that traditional airdrop mechanisms are vulnerable to manipulation by bulk wallets, with large rewards often going to professional airdrop farmers while genuine users contributing to product development only receive limited benefits. Base Verify Onchain generates a stable identity hash for each real user, enabling projects to identify multiple wallets controlled by the same user without accessing sensitive personal data such as names or account information. Users can complete verification via existing accounts on platforms including Coinbase, Instagram, X, and TikTok; the system then returns verified identity credentials to smart contracts, which automatically enforce rules such as claim limits, voting restrictions, or quota controls. To date, Base Verify has been used over 300,000 times, supporting partner projects including Base App, Cody, Scratch, and Bracket. Base Build stated that Verify Onchain will enable decentralized applications (dApps) to implement fairer airdrops, token distributions, governance voting, and user incentive programs. Developers can leverage this technology to limit claim counts per real user, allocate rewards based on verified identities, or translate real-world signals into on-chain reputation, thereby reducing the impact of bots and multi-wallet manipulation on the fairness of Web3 applications.

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