Here’s a claim: every block in our archive is the exact block Solana validators signed, and you can verify that without trusting us.

The proof costs ~$15/month to store across all of Solana’s history, and ~10ms of SHA-256 replay to verify any individual block.

How Solana commitment works

Solana’s commitment model is different from Ethereum’s. Ethereum blocks contain a transactionsRoot — a Merkle root over all transactions. You can prove any single transaction belongs to a block by providing a Merkle path.

Solana doesn’t have that. Instead, it has Proof of History — a sequential SHA-256 hash chain that every validator must agree on. Each block’s PoH entry is the cryptographic proof that this block happened in this order with this content.

The verification flow

For any block in the archive:

1. Read the stored PoH witness (a single SHA-256 hash plus metadata)
2. Replay the SHA-256 chain over the block’s transactions (~10ms on modern hardware)
3. Cross-check the resulting hash against any Solana RPC endpoint’s getBlock response

If the hashes match, the block is authentic. If they don’t, someone tampered with the archive. No trust required — pure math.

Why this matters

Most Solana data providers ask you to trust them. You call their API, they return data, and you assume it’s correct. For analytics and dashboards, that’s fine. For anything involving money — fraud detection, compliance, auditing — “trust me” isn’t good enough.

A cryptographically verifiable archive means:

• Auditors can prove that transaction histories haven’t been altered
• Analytics platforms can guarantee their data matches what validators signed
• Mirror operators can verify data they receive from peers without trusting the source

The cost of storing the PoH witnesses is negligible — roughly $15/month for the full history. The verification itself is fast enough to run inline on every query if you want to.

The broader point

Solana’s full history is public, free, and now verifiable without a trusted intermediary. The missing piece has never been the data — it’s been the indexes and tools that make it usable.

That’s what we’re building.