DeStor Blog

What Are Proofs of Storage, and Why Do They Matter?

Written by Jen King | Sep 30, 2025

When DeStor says storage providers must submit ongoing Proofs of Storage, we mean your data isn’t just stored and forgotten. It’s continually checked, verified, and proven—mathematically, cryptographically, and automatically.

This is the third pillar of verifiable storage. And it’s where trust becomes measurable.

The Problem With Traditional Storage

In traditional cloud systems, once your data is uploaded, you lose all visibility. You have no idea:

  • Where your data physically lives.
  • Whether it’s been altered, misplaced, or quietly deleted.
  • If it's being stored on secure, redundant infrastructure—or on a single hard drive in someone’s closet.

There’s no audit trail. No transparency. And no way to independently verify anything. You're left hoping your provider does the right thing.

Enter: Proofs of Storage

In decentralized systems like the Filecoin Network (which powers Filecoin DeStor solutions), storage providers can’t just say, “Trust me, I’m storing your data.”

They have to prove it—over and over again.


Here’s How It Works:

  1. Storage Deal Is Made
    When a provider accepts your file, they commit to storing it for a specific duration; recorded on the Filecoin blockchain.
  2. File Is Sealed
    The storage provider seals the data using a cryptographic process that binds the content to their specific hardware. They literally can’t fake it later without redoing the entire operation.
  3. Ongoing Proofs Are Required
    • Every 24 hours (or faster), the provider must submit what’s called a Proof-of-Spacetime (PoSt).
    • This proof shows they are still storing your file, without needing to resubmit the file itself.
    • If they fail to provide a valid proof on time? They lose collateral. The system punishes bad actors automatically.

Why This Matters for You

Proofs of Storage turn passive promises into active, verifiable commitments.

You get:

  • Continuous assurance: Your data’s integrity isn’t a one-time check; it’s verified regularly.
  • Built-in accountability: Providers are financially incentivized to do the right thing.
  • Real transparency: Anyone (including you) can audit the proof history for your files.

No more set it and forget it. With Filecoin DeStor, your data is set it, and verify it, forever.

 

This Is the Future of Data Assurance

Proofs of Storage aren’t just a Filecoin innovation. They’re a blueprint for the next generation of cloud infrastructure—where transparency, immutability, and economic incentives replace the old model of blind trust.

At Filecoin DeStor, we make that future accessible. You don’t have to become a blockchain expert to benefit from verifiable storage—you just have to use a decentralized storage solution like Filecoin.


Want to see Proofs of Storage in action?

→ Book a Filecoin demo