Plain English
Proof-of-reserves is a method for an exchange, custodian, or stablecoin issuer to demonstrate they hold the assets they claim. The strongest version combines on-chain reserve verification with a Merkle-tree commitment of all customer balances — so any customer can verify their balance is included in the reported total.
How it actually works
The exchange signs messages from addresses holding its reserves (proving control of the on-chain assets) and publishes a Merkle root committing to all liabilities (customer balances). Customers can independently verify (a) reserve addresses hold X tokens, (b) their balance is in the tree, and (c) total leaves do not exceed total reserves. A “proof-of-liabilities” check confirms the issuer is not omitting customer balances.
What it means for you
After FTX, PoR became table stakes for centralized exchanges and stablecoin issuers. Verify it for any venue you use at scale: Kraken, Binance, OKX, Bitget, and Coinbase all publish them. Stablecoin issuers like Circle (USDC) and Paxos (PYUSD) publish monthly attestations. Trust but verify — and limit balance at any venue that does not publish or where the methodology is weak.
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Educational content only. Not investment, tax, or legal advice.