Chainlink CustodySync Links Qualified Custody to DeFi Lending With Anchorage as Launch Partner

Chainlink has launched CustodySync, a product that connects institutional assets held in qualified custody to decentralized finance lending markets, with Anchorage Digital Bank as its launch partner. The product, announced on Oct. 26, gives institutions a way to borrow from onchain lending markets against assets that stay in regulated custody.

The launch targets a pool of capital that has largely sat out of onchain markets. Chainlink estimates that roughly $700 billion in digital assets sit under custody, compared with more than $80 billion in DeFi lending deposits and over $30 billion in active loans. Chainlink CustodySync is built to let that custodied capital be used as collateral without leaving the custody arrangements institutions are required to keep.

What Chainlink CustodySync does

Chainlink CustodySync keeps a qualified custodian's collateral management system and an onchain lending market synchronized across the full life of a loan, from deposit and borrowing through repayment and liquidation. The custodian's system remains the source of truth for collateral balances, while the lending market supplies the liquidity, and both sides act on the same verified data delivered by Chainlink.

Chainlink said the product allows idle holdings to be put to work, since institutions can take out loans against custodied assets that would otherwise remain unused. It said clients are able to draw on their holdings for borrowing without giving up the custody safeguards they depend on, and that lending markets can serve growing institutional demand for onchain liquidity.

For custodians, Chainlink said the system speeds up deployment and cuts operational overhead, with controls managed by the custodian. Lending markets, in turn, gain access to independent, verifiable data and a consistent risk framework.

How the mechanics work

When an institution deposits collateral with its qualified custodian, the custody balance is published onchain through Chainlink Proof of Reserve, creating a verifiable record that any party can check. A transfer-restricted receipt token representing the custodied assets is then posted to the onchain lending market, and borrowed funds move directly from the lending market to the borrower.

Pricing is aligned on both sides. Onchain price data from Chainlink Data Feeds flows to the lending market, and Chainlink Data Streams pushes the same values to the custodian's offchain systems, so each side calculates loan-to-value ratios from the same data. Chainlink's Runtime Environment coordinates authorized actions and updates custody records.

If a position breaches its liquidation threshold, an appointed collateral agent manages the sale through its own channels. CustodySync records the committed sale proceeds onchain so the position remains stable while the sale settles, with final settlement executed in a single atomic transaction. The product also ships with standardized smart contracts that Chainlink designed and that a lending market or risk curator deploys to execute collateral and loan actions.

The problem it targets

Custody systems and onchain lending protocols were not designed to work together, and many institutions must hold assets with a qualified custodian because of regulation, investment mandates and internal risk policies. Accessing DeFi lending has typically meant moving assets out of existing custody arrangements, which conflicts with internal policies and limits on exposing assets directly to smart contract risk.

Even when the two systems are connected, mismatched data can cause losses. If a custodian tracks collateral status and loan-to-value ratios independently of how a lending protocol tracks the same positions onchain, the two can fall out of sync, and differing data inputs or latency can lead each side to reach its own view on whether a margin call or liquidation has come due. That can trigger false liquidations of positions the custodian views as sound, or postpone liquidation past the point where the collateral covers the loan.

Chainlink said CustodySync addresses these challenges by letting custodians offer direct access to DeFi liquidity without giving up control of client assets, backed by its data infrastructure. The company said its infrastructure already protects tens of billions of dollars spread across 70% of DeFi markets, supplying the pricing and collateral data on which leading lending protocols already depend.

Anchorage Digital as first custodian

Anchorage Digital Bank, N.A., which operates the first federally chartered digital asset bank in the U.S., is the first qualified custodian to adopt Chainlink CustodySync, connecting its institutional client base to DeFi lending markets while assets remain in regulated custody. Anchorage is using its Atlas Collateral Management product, which works in tandem with lending protocols and facilitates core functions on behalf of protocols as their appointed collateral agent.

"Institutions should not have to choose between qualified custody and onchain liquidity," Nathan McCauley, the chief executive and co-founder of Anchorage Digital, said in a statement. He added that institutional borrowers had been seeking crypto lending liquidity that works with the custody controls and operational processes already in place at their firms.

According to the Atlas Collateral Management Manual published by Anchorage, the product operates as an agency service for institutional lending, splitting the duties of holding collateral and monitoring each transaction between separate parties. Under that framework, a margin call requires the borrower to supply enough collateral within an agreed cure period to restore the required ratio, and documentation lists possible responses to a breached threshold including notification, partial liquidation, full liquidation or transfer of the collateral to the secured party.

Adoption questions remain

Chainlink said the estimated $700 billion of digital assets held in custody amounts to under 0.5% of the $250 trillion in traditional assets under custody, framing the connection of institutional capital to onchain finance as a large opportunity. The company said CustodySync expands access to onchain financing within the existing custody framework institutions already rely on.

Whether that opportunity materializes depends on uptake. CustodySync expands institutional access to decentralized lending, but adoption will depend on custodians and lending markets integrating the system, and Chainlink's announcement notes that available features may differ between custodians. Custodians, lending markets and risk curators interested in the product can contact Chainlink Labs to get started.

Conclusion

Chainlink CustodySync is live with Anchorage Digital Bank, N.A. as its first qualified custodian, giving institutional clients a way to borrow from DeFi lending markets against assets that stay in regulated custody. The system synchronizes custody records and lending markets through Proof of Reserve, transfer-restricted receipt tokens and matched price data, with an appointed collateral agent handling liquidations. The next step is broader uptake: Chainlink has invited custodians, lending markets and risk curators to contact Chainlink Labs, and the reach of the product will depend on how many of them integrate it.

Frequently Asked Questions

What is Chainlink CustodySync?

CustodySync is a Chainlink product, announced on Oct. 26, that connects a qualified custodian's collateral management system with onchain DeFi lending markets. It keeps the two systems synchronized at every stage of a loan, covering deposit, borrowing, repayment and liquidation, so institutions can borrow against custodied assets without moving them out of custody.

Who is the launch partner for Chainlink CustodySync?

Anchorage Digital Bank, N.A., home to the first federally chartered digital asset bank in the U.S., is the official launch partner and the first qualified custodian to adopt CustodySync. It uses its Atlas Collateral Management product to support collateral monitoring and loan management, acting as the appointed collateral agent for lending protocols.

How much custodied crypto could Chainlink CustodySync unlock for DeFi lending?

Chainlink estimates roughly $700 billion in digital assets sit under custody, capital that has largely remained out of reach of DeFi lending markets. By comparison, DeFi lending markets hold more than $80 billion in deposits and over $30 billion in active loans. Chainlink says the $700 billion is less than 0.5% of the $250 trillion in traditional assets under custody.

How does Chainlink CustodySync keep custody and lending data in sync?

When collateral is deposited, Chainlink Proof of Reserve publishes the custody balance onchain and a transfer-restricted receipt token represents the assets in the lending market. Chainlink Data Feeds supply prices to the lending market onchain while Data Streams deliver identical values to the custodian's offchain systems, so both sides calculate loan-to-value ratios from the same data.

What happens during a liquidation under Chainlink CustodySync?

When a position reaches its liquidation threshold, an appointed collateral agent manages the sale through its own channels. CustodySync records the committed sale proceeds onchain so the position remains stable while the sale settles, and final settlement executes in a single atomic transaction.