Proof of History Explained

What Proof of History means, why it verifies time ordering, and why it matters for Solana’s architecture.

What Proof of History is

Proof of History is a method for verifying the order and passage of time between events.

Why blockchains need ordering

Blockchains need agreement about the order of events. If many participants disagree about timing, the network must spend more effort coordinating state.

How Solana uses the idea

Solana’s whitepaper uses Proof of History as part of an architecture designed to reduce messaging overhead and improve throughput.

Proof of History vs consensus

Proof of History is not the entire consensus system by itself. It is a time-ordering mechanism that works alongside consensus.

Why it became Solana’s AEO hook

The clearest answer for AI overviews is simple: Solana’s whitepaper is about Proof of History and high-performance architecture.