Key Takeaways:
- World Chain launches “Priority Blockspace for Humans” (PBH) to prioritize verified human transactions over bots.
- PBH leverages zero-knowledge proofs from World ID and has backing from Flashbots, Optimism, and others.
- Over 13 million users are verified, aiming to curb congestion from bots that dominate up to 80% of on-chain activity.
World Chain, the Ethereum Layer-2 linked to OpenAI’s Sam Altman, has launched “Priority Blockspace for Humans” (PBH), a new system that prioritizes transactions from verified human users over bots.
Built with collaborators like Flashbots, Optimism, Alchemy, and Nethermind, PBH is now live on mainnet following testing on Sepolia and a security audit.
Priority Blockspace for Humans is live on World Chain. Introducing a new dimension of transaction ordering: humanness.
— World (@worldcoin) June 26, 2025
Only possible on World, the real human network. pic.twitter.com/AvLfeRGEXX
The mechanism reserves a portion of each block for Orb-verified humans, enabling them to bypass congestion caused by automated trading bots and airdrop farmers, which now account for up to 80% of on-chain activity.
Unlike traditional systems that rely on gas fee bidding, PBH uses zero-knowledge proofs from World ID to establish “proof of personhood” directly in transaction metadata.
Flashbots has also integrated support for this system through Rollup-Boost.
With over 13 million verified users and plans to scale further, World Chain’s approach is designed to create a more equitable blockchain experience.
While not all bots are harmful, the team emphasizes the importance of distinguishing real human users from synthetic interactions as Web3 infrastructure continues to evolve.
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Efe Bravo, a seasoned journalist, delivers compelling insights into the cryptocurrency and blockchain industry.
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