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Circle launched its Arc mainnet on September 16, 2026, and the first hard question arrived almost immediately: what happens if someone steals your USDC on this network? The answer, according to Circle’s Chief Product and Technology Officer Nikhil Chandhok, is nothing. The funds are gone.
Chandhok addressed the rollback question directly during an appearance on the Bankless podcast, framing immutability not as an oversight but as the foundational principle that makes public blockchain infrastructure worth trusting in the first place.
No rollbacks, by design
Arc distributes its consensus responsibilities across more than 20 validators, which means no single party, including Circle itself, holds the authority to reverse a transaction. That structural choice is deliberate. Giving any entity the power to rewrite history would, as Chandhok put it, undermine the trust essential to blockchain technology.
This is a meaningful stance for Circle to take publicly, because Circle has a complicated track record here. USDC operates under a freeze mechanism: Circle can blacklist addresses at the request of law enforcement, and it has done so. That capability exists at the token layer, not the chain layer, and Chandhok appeared careful to keep the two distinct. Arc the chain does not roll back. USDC the token can still be frozen at Circle’s discretion.
The distinction matters. A rollback reverses the history of the chain. A freeze targets a specific address without rewriting anything.
What Arc actually is
Arc runs on the Malachite consensus engine, which delivers sub-second finality. Transactions settle fast, and they settle permanently. USDC is the native gas and settlement asset, meaning every interaction on the network, from a simple transfer to a complex smart contract execution, is denominated in the stablecoin Circle has been building for over a decade.
Chandhok described Arc as an “economic operating system” built for stablecoin-focused financial applications and AI-driven economic activity. That framing positions Arc less as an Ethereum competitor and more as specialized infrastructure, a high-speed settlement rail designed for a specific class of users rather than a general-purpose smart contract platform.
Privacy is part of the pitch. Arc incorporates trusted execution environments, which allow transaction data to remain confidential even from validators. Chandhok confirmed that neither Circle nor the validators can access the contents of private transactions on the network.
The founding validator set reflects that institutional ambition. BlackRock, Visa, and Mastercard are among the entities participating in the network under an initial Proof-of-Authority model.
The ARC token and what comes next
A token called ARC was minted at launch with a total supply of 10 billion. Its eventual purpose is Proof-of-Stake governance, but staking and governance features are not yet live. For now, ARC is a placeholder with a clear roadmap role and no active utility.
The planned transition from Proof-of-Authority to Proof-of-Stake will also change the validator dynamics meaningfully. The current model, anchored by institutional names hand-selected by Circle, is very different from an open staking system where anyone with enough ARC can participate in consensus.
Chandhok’s willingness to state the downside plainly on a public podcast is at least a sign that Circle is not pretending the risk away.
Disclosure: This article was edited by Editorial Team. For more information on how we create and review content, see our Editorial Policy.
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