Four years after the catastrophic collapse of FTX in November 2022, major cryptocurrency exchanges still routinely demonstrate control over customer assets without adequately proving their overall solvency. This critical oversight means they often fail to provide a comprehensive view of their liabilities, outstanding loans, legal claims, and the obligations owed by affiliated companies, leaving investors in a precarious position.
As of August 8, 2026, the industry has largely adopted “proof of reserves” as a standard. However, this process frequently omits crucial financial details, such as whether every customer is included in the verified dataset, the full extent of debts owed to lenders, if displayed coins are pledged as collateral, or if the specific company controlling the wallet is legally responsible for repaying customers.
Why proof of reserves is still limited for cryptocurrency platforms
Proof of reserves emerged as an industry priority following the FTX bankruptcy, with Binance founder Changpeng Zhao notably urging exchanges to publish wallet evidence. Major platforms quickly responded by rolling out dashboards, Merkle-tree tools, and reserve ratios to restore a semblance of trust.
These systems allow an exchange to publish wallet addresses and sign messages with private keys, demonstrating asset control without actual movement. A Merkle tree then converts customer balances into cryptographic hashes, allowing individual users to verify their account’s inclusion in the root without compromising other customers’ privacy. Newer systems, like Binance’s zk-SNARK verification, even confirm calculations follow rules while keeping balances private.
Major exchanges like Binance, OKX, Kraken, and Crypto.com all now offer variations of this process. These advancements significantly improve upon a model that demanded blind faith in corporate assertions. They can expose false claims about asset holdings and make large withdrawals more visible.
But these systems only go so far. A Merkle tree, for instance, can authenticate records placed within it, yet it can’t identify accounts deliberately omitted before the tree was constructed. It also won’t flag a bank loan, a tax bill, a legal judgment, or a guarantee made to an affiliated company, tying a mathematically rigorous process to a financial perimeter arbitrarily defined by the exchange.
Most reserve reports are also a snapshot, measuring assets at a specific point in time. This means assets can move before or after the measurement, and the report is often published only after an internal team or external firm completes its work. Consequently, the total amount reveals little about the funds’ origin or their availability during a sudden surge of withdrawals.
The opaque nature of crypto exchange liabilities
Cryptocurrency exchanges possess an inherent advantage over traditional financial institutions because much of what they hold exists on public blockchains. However, this transparency doesn’t extend to their liabilities, which are typically recorded across internal databases, bank accounts, contracts, and corporate ledgers, offering little visibility through blockchain analysis alone.
Customer claims reside in an exchange’s database, fiat balances depend on banks and payment processors, and derivatives positions can change value rapidly. The landscape of liabilities also includes lending products, institutional loans, vendor bills, taxes, and legal claims, often spread across multiple companies and jurisdictions.
A public dashboard showing $10 billion in crypto assets, for example, gives no comprehensive picture of whether the exchange actually owes $8 billion, $10 billion, or $15 billion. It doesn’t indicate if another creditor holds a claim over those same assets, nor how quickly those assets could meet a sudden wave of withdrawals.
Even regulatory bodies have voiced concerns. The Public Company Accounting Oversight Board (PCAOB) has warned investors that proof-of-reserve reports vary widely and fall outside its audit oversight. They may not provide an adequate basis for determining a company’s ability to meet its obligations.
The SEC chief accountant has also highlighted related confusion, noting that reviews, attestations, and agreed-upon-procedures engagements typically examine a much narrower scope of evidence than a full financial-statement audit. This holds true even when an accounting firm conducts the work.
An exchange might publicize the involvement of an outside accounting or security firm. But that firm may have been engaged only to compare specific wallet balances against a selection of customer liabilities, potentially excluding corporate debt, internal controls, related parties, litigation, and the company’s ability to remain operational.
Corporate complexity masks true financial health
The intricate corporate structures of many global crypto exchange brands further complicate the assessment of solvency. A single brand might operate through numerous distinct legal entities: one serving European retail customers, another handling institutional contracts, a third controlling wallet keys, and yet another employing staff.
Lending, derivatives, and custody services frequently operate under separate terms, adding layers of complexity. A public reserve page might refer to assets held across a global group without clearly identifying which specific company owns each wallet. Conversely, customer agreements may assign repayment responsibility to a particular subsidiary.
These seemingly minor distinctions become critically important during an insolvency event. They help determine which laws apply to the collapse and how creditors are prioritized for repayment. Without clear identification of these legal entities and their respective responsibilities, customers face significant uncertainty.
Coinbase, as a publicly listed company, offers a stark contrast to many private exchanges in this regard. It publishes audited consolidated financial statements, filed with the SEC, which cover debt, collateral, derivatives, commitments, subsidiaries, and related-party transactions alongside its crypto holdings. Deloitte, its auditor, addresses both the financial statements and internal controls in its reports.
While such disclosures don’t guarantee Coinbase will avoid a withdrawal surge, management failures, or technical issues, they highlight the significantly broader evidence available when a reviewer examines the company as a complete economic entity. This holistic view moves far beyond simply evaluating a collection of wallet balances.
Achieving comprehensive financial accountability
A genuinely credible solvency framework for crypto exchanges would seamlessly integrate blockchain verification with conventional financial reporting. This would necessitate exchanges proving definitive control over on-chain assets while also reconciling every customer balance with a comprehensive general ledger.
Such a framework would also demand clear identification of the legal entities responsible for repayment, full disclosure of assets pledged to other creditors, and a transparent explanation of how fiat, derivatives, lending products, and institutional accounts are managed. Historical reports should remain publicly accessible, providing ongoing context.
External auditing firms would be required to explicitly state the exact scope, methodology, and limitations of their work, leaving no room for ambiguity. Furthermore, large custodial platforms would need to publish audited consolidated financial statements or equivalent regulatory disclosures, comprehensively covering debt, liquidity, collateral, related-party exposure, and the segregation of customer assets.
Within this robust framework, cryptographic proofs would serve as precise evidence regarding assets and customer balances. Simultaneously, financial audits and legal disclosures would establish how those assets correlate to the obligations of the wider corporate structure. Each layer would contribute to a unified financial picture, empowering customers, auditors, and regulators to collectively evaluate custody, accounting completeness, and corporate responsibility.
FTX undoubtedly made visible reserves a fundamental expectation for any exchange entrusted with customer funds. However, the next crucial standard must extend beyond mere asset visibility.
It needs to establish a clear link between those visible assets and every material liability and legal entity behind them, ultimately providing customers with evidence that spans from the wallet address right through to the company legally bound to return their money.