Proof of reserves is a cryptographic report that shows a crypto exchange holds the assets it claims to hold for customers. The exchange publishes a snapshot of its wallets and a Merkle tree of user balances, so anyone can verify their own account is included and the totals add up. It proves assets exist. It does not prove the exchange has no hidden debts.
That second sentence is the part most people skip. So this guide covers what proof of reserves shows, what it leaves out, how to verify your own balance in five minutes, and how I use it before putting money on any platform. For every other term in this cluster, our crypto security glossary has the short definitions.
Why proof of reserves exists
Before November 2022, most exchanges simply asked you to trust them. Then FTX collapsed, and it turned out customer deposits had been quietly lent to a sister trading firm. Nobody could see it, because nothing forced FTX to show its books.
Within days, Binance, OKX, Bybit, KuCoin and Crypto.com all promised to publish proof of reserves. Kraken had actually run audits since 2014, but almost nobody else bothered. After FTX, it became the minimum standard for a serious exchange.
Four years later, the same tool is doing a different job. After the Binance hack, the exchange took a fresh snapshot on October 31, 2026 and published the full proof two days later. For once, users could check for themselves that their balances were backed again, as our Binance hack post mortem shows. That is what FTX could never do.
How proof of reserves works
The process has three parts, and each one matters.
First, the exchange takes a snapshot of every customer balance at one moment in time. Those balances get hashed into a Merkle tree, which is a structure that lets you verify your own leaf is inside the total without revealing anyone else’s account.
Second, the exchange proves it controls specific on-chain wallets. It signs a message from each address or moves a small amount, so an auditor or the public can confirm ownership rather than take a screenshot on faith.
Third, someone compares the two. If the wallets hold at least as much as the Merkle tree says customers are owed, the reserve ratio is 100% or above. OKX, for example, has published monthly ratios above 100% since late 2022, and Bitget was showing around 130% coverage in early 2026.
Newer versions add zero-knowledge proofs. Instead of exposing the full tree, a zk-SNARK proves the total is backed 1:1 without revealing any single balance. Binance has used this since 2023, and it is the version behind its post-hack snapshot.
How to verify your own balance
Every big exchange runs the check slightly differently, but the steps are close enough to list once.
Step 1. Log in and open the proof of reserves page, usually under the Security or Transparency menu.
Step 2. Find the latest snapshot date. If it is more than a month old, that is already a signal.
Step 3. Click “Verify my assets” or the equivalent. The page shows your balances at the snapshot time and a Merkle leaf or hash.
Step 4. Compare the balances to what you actually held that day. They should match exactly, not roughly.
Step 5. Open the public verification tool, paste your leaf hash and confirm it sits inside the published root.
If all five line up, your account was counted. That is all it proves, though, which brings us to the gaps.
What proof of reserves does not prove
This is where marketing and reality part ways. A clean proof of reserves still leaves four holes.
It ignores liabilities. An exchange can show $10 billion in wallets while owing $12 billion to lenders, and the report looks fine. Proof of liabilities is the missing half, and almost nobody publishes it in full.
It is a snapshot. Funds can be borrowed for the day of the audit and returned the day after. In November 2022, Crypto.com accidentally sent 320,000 ETH to Gate.io and got it back, which made everyone wonder how often exchanges shuffle coins around reporting dates.
It only covers listed assets. Binance’s October 2026 proof covered ten tokens at first. Anything outside the list is unproven until the next snapshot.
It cannot stop a hack. Bitget published monthly proofs with ratios well above 100%. It still lost $387 million in September 2026. The proof told you the money was there. It said nothing about whether someone could take it.
So treat proof of reserves as one signal, next to the size of the protection fund, the licensing and the hack history. Our exchange reviews check all four for every platform we cover.
How I use it before depositing
My rule is simple. No proof of reserves means no deposit beyond pocket money. An exchange that will not show its wallets in 2026 has decided transparency is optional, and I am not going to be the one testing that decision.
Beyond that, I look at three things. How recent the last snapshot is, whether the ratio has moved over the past six months, and whether the exchange has ever had to prove the numbers under stress. Bybit passed that test in 2025 and Binance passed it this month. Both kept withdrawals open or reopened them within days, and both published fresh proofs afterwards.
Even then, the proof changes what I leave on an exchange, not whether I use one. Trading capital stays on the platform because it has to. Everything else goes to self custody, and our guide on self custody vs exchange explains where I draw that line. The biggest exchange hacks list is a reminder of why the line exists at all.
Keep This Content Free
Explaining what a Merkle tree does for your balance is not the kind of post that goes viral, but it is the kind that keeps people solvent. OKX and Bybit both publish regular proof of reserves, which is one reason they are the two exchanges we send readers to. Signing up through our links gets you their welcome bonus and keeps guides like this one free.
Final Words
Proof of reserves turned “trust me” into “check for yourself”, and that alone makes it worth five minutes of your time. Verify your balance after every snapshot, watch the ratio over time, and read the fine print on which assets are covered.
Just remember what it cannot do. It will not show debts, it will not catch a borrowed balance and it will not stop a hacker. For the rest of the exchange safety picture, the running coverage under our security tag is where every hack and breach gets written up. Next in this series, how exchange protection funds decide who gets paid back after a hack.
FAQ
What is proof of reserves in crypto?
Proof of reserves is a published, verifiable report showing that an exchange holds enough assets to cover customer balances. It uses a Merkle tree of user balances and signed on-chain wallets so anyone can check the totals.
Does proof of reserves mean my funds are safe?
No. It proves assets exist at one moment. It does not show debts, cover every token or prevent a hack. Bitget had clean monthly proofs and still lost $387 million in 2026.
Which exchanges publish proof of reserves?
Binance, OKX, Bybit, Bitget, KuCoin, Kraken and Crypto.com all publish regular reports. Binance and OKX use zero-knowledge proofs, Kraken uses third-party audits.
How do I verify my balance in proof of reserves?
Log in, open the proof of reserves page, find the latest snapshot and click verify. Compare the listed balances to what you held that day, then confirm your Merkle leaf sits inside the published root.
What is the difference between proof of reserves and proof of liabilities?
Proof of reserves shows what an exchange holds. Proof of liabilities shows what it owes. Only both together show whether it is solvent, and very few exchanges publish the second in full.
Did Binance publish proof of reserves after the hack?
Yes. Binance took a snapshot on October 31, 2026 and published the zero-knowledge proof on November 2, covering ten major tokens. A second snapshot with more tokens followed on November 4.
