Four years after FTX's implosion exposed how little customers actually knew about exchange finances, the industry's standard transparency measure remains incomplete. According to a report from CryptoSlate, most crypto exchanges continue to publish proof-of-reserves data that confirms holdings but stops short of confirming solvency.
Proof-of-reserves emerged as the industry's go-to response to FTX. Exchanges began publishing cryptographic attestations or third-party snapshots showing they held customer assets in wallets under their control. The practice was meant to reassure users that funds had not been secretly rehypothecated, lent out, or lost.
But showing assets is only half of a solvency equation. Solvency requires comparing what an exchange holds against what it owes to customers. CryptoSlate's report notes that this liabilities side of the ledger is frequently missing, unaudited, or disclosed with far less rigor than the assets side.
FTX itself is the cautionary example. Sam Bankman-Fried's exchange appeared, by some public signals, to hold customer funds responsibly, right up until it did not. Billions of dollars in customer deposits had been funneled to Alameda Research, a related trading firm, leaving FTX unable to meet withdrawal demands once confidence collapsed. A snapshot of assets alone would not have caught that liabilities had ballooned beyond what those assets could cover.
The distinction matters because proof-of-reserves, as commonly implemented, is a point-in-time exercise. It can confirm that an exchange controlled a certain amount of Bitcoin or Ether on a given day. It does not confirm that those assets remain unencumbered the next day, nor does it verify the exchange has not simultaneously pledged the same assets elsewhere as collateral. Without matched, audited liabilities data, users are left trusting exchanges on the very question FTX made most urgent.
Regulators and industry groups have pushed for more rigorous standards since 2022, including calls for real-time reserve attestations and independent audits that cover both sides of the balance sheet. Some exchanges have adopted more detailed disclosures voluntarily. But according to CryptoSlate's reporting, a full solvency proof, one that ties customer liabilities to verified assets under an accepted audit standard, remains the exception rather than the norm across the sector.
The gap persists partly because full audits are costly and complex for exchanges operating across multiple jurisdictions with varying accounting rules. It also persists because there is no single regulatory body compelling exchanges to adopt a uniform solvency-proof standard globally. That leaves the depth of assurance largely up to each exchange's own disclosure choices.
Market Impact
If accurate, the persistence of asset-only proofs means retail and institutional users still cannot fully verify exchange solvency before depositing funds. That leaves counterparty risk embedded in the market structure much as it was before FTX, even as trading volumes and institutional participation in crypto have grown.
The finding could add pressure on exchanges to adopt fuller audited disclosures, particularly as institutional capital seeks clearer custody and solvency guarantees before committing larger allocations. It may also reinforce arguments from regulators pushing for standardized reserve and liability reporting requirements across jurisdictions.
The report underscores that proof-of-reserves, despite becoming standard practice since FTX's collapse, has not closed the underlying trust gap it was meant to address. Until liabilities are verified alongside assets, solvency for many exchanges remains a matter of disclosure choice rather than proof.
Frequently Asked Questions
What is the difference between proof-of-reserves and proof-of-solvency?
Proof-of-reserves shows what assets an exchange holds at a given moment. Proof-of-solvency would additionally verify that those assets are sufficient to cover all customer liabilities, which most current disclosures do not fully address.
Why did FTX's collapse highlight this issue?
FTX appeared to hold customer assets responsibly by some public measures, but had secretly funneled billions in customer funds to an affiliated trading firm. That mismatch between assets and liabilities was not visible through simple reserve checks.
Have exchanges improved transparency since 2022?
Some exchanges have adopted more detailed voluntary disclosures and third-party attestations, according to the CryptoSlate report. However, comprehensive audits covering both assets and liabilities remain uncommon across the industry.
Is there a regulatory requirement for exchanges to prove solvency?
No single global standard currently mandates full solvency proofs for crypto exchanges. Disclosure practices vary by jurisdiction and by each exchange's own policies.