What is a Proof of Reserves?
For stablecoin issuers, Proof of Reserves (PoR) is an independent verification process confirming that all circulating stablecoins are backed by an equivalent value of reserve assets.
Whether the stablecoin is pegged to USD, EUR, or other assets, PoR ensures that each token in circulation can be redeemed at face value – a cornerstone of trust in digital currency ecosystems.
By validating the existence, value, and control of reserves, PoR provides assurance to:
Users that their stablecoins are fully backed and redeemable
Investors that the issuer operates with solvency and integrity
Regulators that issuance is compliant with emerging stablecoin oversight frameworks
Why Proof of Reserves Matters for Stablecoins
In the stablecoin sector, transparency isn’t just good practice – it’s essential to market credibility and regulatory approval. PoR helps:
Reduce Counterparty Risk – Holders can trust their tokens are backed 1:1 by real, verifiable reserves
Increase Transparency – Public attestations strengthen ecosystem confidence
Meet Regulatory Expectations – PoR aligns with requirements in jurisdictions developing stablecoin legislation
Boost Institutional Adoption – Institutional players demand independently verified, frequent reporting
How Stablecoin Attestations Work
Attestations are independent accountant reports confirming the existence, ownership and value of reserve assets on a specific date. For stablecoins, this typically covers:
Reserve Asset Verification
Confirmation that assets such as U.S. Treasuries, cash, or high-grade money market instruments match or exceed circulating stablecoin supply
Validation of both on-chain and off-chain holdings
Reporting
Issuance of clear, standards-based reports for regulators, investors, and token holders
Summaries of asset composition, custodian arrangements, and relevant blockchain references
The Nephos Approach
Nephos delivers attestation services designed for stablecoin issuers, blending traditional financial rigor with blockchain-native transparency. Our engagements include:
- Full Independence – Objective, high-integrity attestations without conflicts of interest
- Stablecoin & Digital Asset Expertise – Combining accounting depth with crypto-native technical knowledge
- Timely & Regular Reporting – Monthly, quarterly, or ad-hoc reports to support continuous market trust
Client Spotlight: Mountain Protocol
Nephos serves as the attestation provider for Mountain Protocol’s USD-pegged stablecoin. Each month, we independently verify that the total token supply is backed 1:1 by reserve assets held in custody.
Reports include:
Third-Party Custodian Statements – From banks and regulated fund managers
Asset Composition & Valuation – Short-dated U.S. Treasuries, cash, and equivalents
Statements of Control & Access – Detailing how reserves are safeguarded
On-Chain Verification References – Where applicable for added transparency