Introduction to Bitcoin Wallets
What wallets do, the main types available, and how they relate to your keys.
How to Store Bitcoin
What Is Proof of Reserves?
How custodians demonstrate that client balances are backed—and what to look for in published reports.
Overview
Proof of reserves is an attestation that a custodian holds assets matching or exceeding customer liabilities at a point in time. Methods vary; some publish on-chain wallet balances and allow clients to verify inclusion in the liability snapshot.
Attestations are snapshots, not live guarantees. Read what each report covers, who audits it, and whether liabilities include all account types. For Nexus-specific reporting and verification tools, see our company Proof of Reserves page after reading this overview.
What attestations show
Proof of reserves demonstrates custodian assets match or exceed customer liabilities at a snapshot. Methods range from balance disclosures to cryptographic inclusion trees.
No single format is perfect—read what liabilities are included and whether loans are disclosed.
Limits of snapshots
Attestations are moment-in-time. Flows after the snapshot change balances. Regular independent reviews beat one-off posts.
User verification features matter: can you check your balance against the published tree with open tools?
Using reports as a holder
Compare custodians on transparency cadence and auditor reputation. Strong attestations do not replace diversification or self-custody for savings you cannot afford to lose to platform risk.
On Nexus, live reserve metrics and verification tools are on the company Proof of Reserves page. This article explains the concept; that page shows current attestation data.
