Does a Crypto Exchange's Proof of Reserves Actually Prove It Is Solvent?
Direct answer
Proof of reserves vs solvency
No. A proof of reserves can show that an exchange controlled certain crypto assets at one moment and, with a Merkle tree, that your balance was included in the customer total. It does not prove solvency, because solvency means assets exceed all liabilities. The PCAOB's Office of the Investor Advocate warns that proof-of-reserve engagements are not audits and "do not provide any meaningful assurance"; the procedures likely do not address the entity's liabilities, whether the assets were borrowed for the snapshot, or whether they were lent or moved afterwards. The SEC's Investor.gov adds that such reports do not tell the whole story about an entity's liabilities.
- PoR = assets at one point in time, not an audit (PCAOB advisory)
- Solvency = assets minus all liabilities, which PoR usually omits
- Borrowed assets at snapshot time would not show up (PCAOB)
- Merkle tree lets you check your balance was counted (Kraken)
- Not covered by PCAOB standards or inspection
After exchange failures in 2022, "proof of reserves" became a selling point. It is useful, but it answers a narrower question than most users think.
What people on X are asking
In September 2026 one post asked: "Can you really trust an exchange's Proof of Reserves?", suggesting users look for on-chain wallet holdings and "clear information about assets & liabilities". A July 2026 thread put it simply: "the exchange says it has money. But is that really true?", and an October 2026 post argued that most such checks are "static, once-a-year snapshots" that "can easily mask off-chain liabilities". The US regulators' own warnings back up the sceptics.
What people in the thread said
- @jaiko_1113 wrote that proof of reserves only matters when users can actually verify it, and @AkiraRyukyu said on-chain verification counts for more than a polished screenshot. Both are fair, with one addition: even a verifiable asset proof says nothing about liabilities, which is the PCAOB's main warning.
These are community comments, summarised in our words; the data and sources below come first.
The fact-checked answer
What the PCAOB says. In its investor advisory on third-party verification and proof-of-reserve reports, the PCAOB's Office of the Investor Advocate writes that these engagements "are not audits and, consequently, the related reports do not provide any meaningful assurance to investors or the public." It lists the gaps: the procedures "likely do not address the crypto entity's liabilities, the rights and obligations of the digital asset holders, or whether the assets have been borrowed by the crypto entity to make it appear they have sufficient collateral". Because they cover one point in time, they say nothing about whether assets were "used, lent, or otherwise became unavailable" afterwards. They are not performed under PCAOB standards or inspected by the PCAOB, and in agreed-upon-procedures engagements the exchange's management chooses the procedures.
What the SEC adds. Investor.gov's bulletin on alternatives to audits says proof-of-reserves reports are not audit reports, "may have no specific requirements", do not include a complete set of financial statements and do not tell investors "the whole story about the entity's liabilities". It calls it a red flag when a company presents such reports as equivalent or superior to an audit.
What a good proof of reserves does show. Kraken's published method is typical: an independent accountant takes an anonymised snapshot of client balances, builds a Merkle tree (a cryptographic structure summarising all balances) and checks signatures proving the exchange controls on-chain addresses holding at least that amount. Each customer can verify that their balance was included. That is real evidence about one side of the balance sheet at one time.
What proof of reserves covers, and what solvency needs
Based on the PCAOB investor advisory, the SEC's Investor.gov bulletin and Kraken's description of its own method. Tap a column header to sort.
| Does the exchange control these wallets? | Yes, at the snapshot | Yes |
| Is my balance included in the total? | Yes, via Merkle proof | Yes |
| Are customer liabilities complete? | Partly: depends on the snapshot | Yes |
| Are there loans, debts or other liabilities? | Usually not | Yes |
| Were assets borrowed just for the snapshot? | Cannot tell (PCAOB) | Yes |
| What happened after the snapshot? | Not covered | Ongoing |
| Internal controls and governance | Not covered (PCAOB) | Yes |
| Performed under PCAOB audit standards? | No | Audit: yes |
Solvency is assets minus liabilities. An exchange can hold 100,000 BTC for customers and still be insolvent if it owes lenders more than its other assets are worth, or if some "customer" coins are pledged elsewhere. Only a full set of audited financial statements, or at least a liabilities-inclusive attestation, addresses that. Even then, it is a picture at a reporting date.
UXS decision diagram
How much should a proof of reserves reassure you?
Text version of the diagram
- Can you verify your own balance in the Merkle tree? If no: Treat the report as marketing; it cannot be checked
- Does the report cover liabilities, not just assets? If no: It shows reserves, not solvency
- Is it frequent (monthly or better) and by a named independent firm? If no: A one-off snapshot says little about today
- Does the company also publish audited financial statements? If no: Keep only what you need on the exchange
- Otherwise: Better evidence, but still not a guarantee; self-custody removes the exchange risk
Diagram drawn by UXS. A simplified decision aid for education, not a recommendation.
Quick poll
What would make you trust an exchange's reserves?
What each answer means
- A Merkle-tree proof I can check: It proves inclusion of your balance, not that liabilities are covered.
- Audited financial statements: Closest to solvency evidence, though still a point-in-time view.
- Regular reports by a named firm: Frequency helps, but check what the procedures actually covered.
- Nothing: I self-custody: Removes exchange risk; you take on key-management risk instead.
Your answer is stored only in this browser (localStorage). UXS does not collect, count or publish votes, so no totals are shown.
For the practical question of where to keep coins, see whether it is safe to leave crypto on an exchange.
Decision helper
| What you see | What it means |
|---|---|
| "Proof of reserves: 100%+" | Assets at a moment exceed the counted customer balances |
| "Audited" in marketing but only a PoR | A red flag per Investor.gov |
| Liabilities-inclusive attestation | Better, check scope and date |
| Audited statements | Strongest public evidence |
To reduce exchange exposure, see is a hardware cold wallet safer than a hot wallet and what a seed phrase is; for the dollar tokens exchanges hold, are stablecoins safe.
Common mistakes
- Reading "reserves" as "solvent".
- Trusting a screenshot of wallet balances.
- Ignoring the date of the snapshot.
- Leaving more on an exchange than you trade with.
FAQ
What is proof of reserves?
A report that an exchange controlled certain assets at a point in time, often with a way to check your balance was counted.
Does proof of reserves prove solvency?
No. It usually omits liabilities; the PCAOB says it gives no meaningful assurance.
Is proof of reserves an audit?
No. It is not performed under PCAOB audit standards or inspected by the PCAOB.
What is a Merkle tree proof?
A cryptographic check that your account balance is included in the total the auditor counted.
Can an exchange borrow coins for the snapshot?
The PCAOB says the procedures likely would not reveal that.
How can I reduce exchange risk?
Keep only trading balances on exchanges and hold the rest in self-custody.
Sources
- PCAOB: Investor advisory on proof of reserve reports
- Investor.gov: Exercise caution with alternatives to financial statement audits
- Kraken: Proof of reserves
Facts checked November 10, 2026. X posts are cited as evidence of the question, not of the answer.