Proof of reserves is the most misunderstood disclosure in this industry, and the misunderstanding is structural rather than accidental. A reserve check shows that an exchange controls a quantity of crypto at a moment in time. Solvency is a statement about assets against liabilities — what is owed to customers. An exchange can pass the first test and fail the second, and several have.
The gap between the two is where the useful reporting sits. Does the attestation cover liabilities at all, or only the asset side? Was it performed by an auditor, and under what standard? Is it a point-in-time snapshot, and if so, how recent? Does it cover the whole entity or one subsidiary? These questions have documented answers that differ sharply between exchanges, and the differences are rarely reflected in how the disclosures are marketed.
We treat an attestation as a document to be read rather than a badge to be counted. When an exchange publishes one, we record what it covers, who signed it, what standard it was performed under and when it was last refreshed. A full financial audit and a reserve attestation are not the same instrument, and we do not let the word “audited” blur them.
A reserve check proves an exchange controls a pile of crypto. It rarely proves the pile is big enough to cover what customers are owed…
A Merkle-tree proof of reserves checks that an exchange's coins match a summary of what it owes, on one date.
It shows an exchange or issuer controlled certain assets on a certain date. It does not show the entity can cover what it owes, that…
Crypto.com's reserve disclosure and Coinbase's audited financial statements answer different questions, checked by different people.
Kraken has, at times, published a cryptographic proof of reserves. Bitstamp points to a traditional outside audit.
A $4.3 billion settlement, a monitorship whose status nobody has confirmed in months, and a reserves report that is self-verified, not audited.
KPMG gave an unqualified opinion on one entity's books as of one date. Six months later, Tether's own attestation showed the buffer had fallen by 40%.
Kraken's parent company says adjusted revenue rose 17% even as trading volume fell. Two trade outlets reported the release; we don't hold it.
We do not declare exchanges safe or unsafe. Solvency is a moving position and no outside party can verify it continuously from public documents. What we can do is show exactly what each exchange has published, what that document does and does not establish, and how old it is — and leave the judgement where it belongs.