Proof of reserves, read like an auditor

A proof-of-reserves attestation verifies that an exchange holds sufficient assets to cover customer liabilities at a specific moment. It does not guarantee future solvency, nor does it replace a full audit of liabilities or operational security. The mechanism typically involves a cryptographic snapshot of on-chain holdings matched against a list of user balances. Major platforms publish these reports with varying degrees of technical transparency. OKX releases a monthly zk-STARK Proof of Reserves, asserting a 1:1 reserve ratio. Their 44th report from Jun 2026 declared $22.65B in primary assets. Bitget follows a similar monthly schedule using a Merkle-tree Proof of Reserves, stating that 100% of user assets are held. Their approach includes open-source code on GitHub to allow independent verification of the cryptographic proofs. CoinEx also maintains a Merkle-tree Proof of Reserve page, claiming a 100% reserve rate. These disclosures allow users to check if the total liabilities match the total assets held on-chain. However, the attestation confirms only that the reserves exist and match the ledger snapshot; it does not validate the quality of those assets or the absence of off-balance-sheet risks. Users must distinguish between a mathematical proof of balance and a comprehensive financial health check. The data shows a trend toward regular publication, yet the methodologies differ significantly in their ability to prevent fraud or hide insolvency.