On April 27, 2026, Block — the parent company of Cash App, Square, and Bitkey — did something most fintech and crypto companies still don’t: it opened its Bitcoin books to the public. The new Proof of Reserves dashboard lets anyone check that the Bitcoin Cash App says it’s holding for customers is actually there on the blockchain. It launched alongside an upgraded Bitkey hardware wallet and a batch of new Cash App Bitcoin features.
If you keep Bitcoin in Cash App, this matters. Here’s what Proof of Reserves is, how to use it, and — just as important — what it does not tell you.
What Is Proof of Reserves?
Proof of Reserves (PoR) is a cryptographic way for a custodian to demonstrate that it controls enough Bitcoin to cover what it owes customers. When you buy Bitcoin in Cash App, you don’t hold the coins yourself — Block holds them in wallets on your behalf. Historically you just had to trust that the balance on your screen was backed by real coins. PoR replaces some of that blind trust with something you can check.
Block’s approach combines two things:
- On-chain wallet addresses and cryptographic signatures that prove Block controls the Bitcoin in those wallets (without exposing any private keys).
- Third-party audit results that check total customer balances against the on-chain reserves.
Block states that customer Bitcoin is held 1-for-1 — one real coin in reserve for every coin owed to customers — and the dashboard separates customer holdings from Block’s own corporate treasury Bitcoin so the two aren’t blurred together.
How to Verify Cash App Holds Your Bitcoin
The dashboard lives at block.xyz/proof-of-reserves. A key privacy feature: the verification runs locally in your browser — Block says no data leaves your device during the check. You’re loading Block’s signed proof and confirming the math on your own machine.
| Step | What you do | What it confirms |
|---|---|---|
| 1 | Open the Proof of Reserves page on Block’s site | You’re on the official source |
| 2 | Review total customer Bitcoin, corporate Bitcoin, and combined reserves | Reserves are separated and disclosed |
| 3 | Load Block’s signed proof into the in-browser verification tool | Signatures are valid and run locally |
| 4 | Check the published on-chain wallet addresses on a block explorer | The coins exist on the blockchain |
| 5 | Compare the audit attestation date to today | How fresh the snapshot is |
A worked example
Say you hold 0.05 BTC in Cash App. Proof of Reserves doesn’t show your 0.05 BTC by name — that would leak your balance. Instead, it proves that the aggregate customer pool includes coins covering every customer’s balance. Many PoR systems (built on Merkle-tree math) also let an individual confirm their own balance was included in the total using a private proof, without revealing it to anyone else. The takeaway for you: if the audited customer total is fully backed by verified on-chain coins, your slice of that pool is backed too.
The New Bitkey Wallet
Launched the same day, the updated Bitkey hardware wallet is Block’s answer for people who’d rather hold their own keys instead of leaving Bitcoin with a custodian. Key features:
- A new secure touchscreen that displays and authorizes every security-critical action, so you verify transactions on the device itself.
- 2-of-3 multisig architecture — keys are split between your phone, the hardware device, and Block’s server recovery, so no single point of failure.
- No seed phrases to write down or lose.
- Built-in inheritance planning so a beneficiary can recover funds.
At launch it was available for preorder with devices “shipping soon.” Block did not disclose pricing for the new screen model in its announcement, so confirm the current price on Block’s Bitkey site before ordering.
Cash App’s Other New Bitcoin Features
Proof of Reserves arrived in the same update as several accumulation tools. Confirm eligibility in-app, as availability varies by market and account:
| Feature | Detail |
|---|---|
| Auto-convert payments | Eligible users can auto-convert incoming P2P payments into Bitcoin |
| Bitcoin Back | 5% back in Bitcoin at Square merchants, capped at $30/month through Dec 31, 2026 |
| Get paid in Bitcoin | Direct deposit into Bitcoin with no fees or spreads |
| Zero fees on large buys | No fees or spreads on Bitcoin purchases over $2,000 |
| Withdrawal limits | Raised to $10,000 daily / $25,000 weekly |
What Proof of Reserves Does NOT Prove
This is the part most headlines skip. PoR is genuinely useful, but it has real limits:
- It’s a snapshot, not a live feed. Block describes it as a “point-in-time” view, not an audit or guarantee of solvency. Balances can change between attestation dates.
- It shows assets, not liabilities. PoR proves the coins exist; it can’t fully prove Block doesn’t owe more than it shows elsewhere. That’s why the third-party audit component matters.
- It’s not the same as self-custody. Verified custody is still custody. If you want to truly control your coins, that’s what Bitkey (or any hardware wallet) is for.
Think of it like a bank publishing an audited vault count: reassuring, but not a live camera on your specific cash.
Frequently Asked Questions
Does Proof of Reserves mean my Cash App Bitcoin is 100% safe?
It significantly increases transparency — you can confirm the coins exist on-chain and that an auditor checked customer totals. But it’s a point-in-time snapshot, not a solvency guarantee, and your Bitcoin is still held by a custodian rather than by you. For maximum control, withdraw to a self-custody wallet like Bitkey.
Can I see my exact Cash App Bitcoin balance in the dashboard?
No individual balances are published — that protects your privacy. The dashboard shows aggregated customer and corporate totals. PoR systems are designed to prove your balance is included in the total without exposing it to other people.
Do I need to be technical to verify reserves?
Not really. Block’s tool runs the verification in your browser and shows the results. Cross-checking the published wallet addresses on a public block explorer is optional and just adds an extra layer of confidence.
Is the new Bitkey better than leaving Bitcoin in Cash App?
They serve different goals. Cash App is convenient for buying, earning, and spending. Bitkey is about self-custody — you hold the keys, so no company can lose or freeze your coins. Many users do both: Cash App for activity, Bitkey for long-term savings.
The Bottom Line
Block’s Proof of Reserves is a meaningful step toward transparency: for the first time, Cash App users can independently check — privately, in their own browser — that the Bitcoin behind their balance actually exists on-chain. Just keep the limits in mind. It’s a verified snapshot, not a live guarantee, and it’s not a substitute for holding your own keys. If verifiable, hands-on control is your priority, that’s exactly the gap the new Bitkey wallet is built to fill.
WalletWisp is informational and educational only, not financial, investment, or tax advice. Verify current fees, limits, and features directly with Cash App and Block before acting.
