Liability Snapshot
A liability snapshot is a specific, time-bound record of all outstanding obligations an entity owes to its customers. In the context of Proof of Reserves, this snapshot is the baseline against which total assets are compared.
It captures the total sum of all user balances at a precise moment, effectively creating a "debt" statement. To be effective, the snapshot must be comprehensive, including all account types and sub-accounts.
If an exchange omits certain liabilities from the snapshot, the resulting proof of solvency will be misleading. The accuracy of this data is critical for maintaining market trust and ensuring that the audit is meaningful.
Exchanges often coordinate these snapshots with independent third-party firms to provide an extra layer of verification. Because crypto markets operate 24/7, the timing of the snapshot is significant, as it captures the state of the system during a specific volatility regime.
Regular, frequent snapshots are preferred to prevent entities from temporarily inflating their balances to pass an audit.