Ceffu Enables Custody and MirrorRSV Integration for BlackRock’s BUIDL

2025-11-14  •  3 min read


Ceffu is pleased to announce our custody support and MirrorRSV integration for the BlackRock USD Institutional Digital Liquidity Fund (BUIDL), a U.S. Treasury fund from BlackRock tokenized by Securitize.

This marks another milestone in Ceffu’s mission to bridge traditional finance and digital assets through Real World Assets (RWAs) with secure and compliant access to one of the largest on-chain treasury funds for institutional clients.

MirrorRSV – an enhanced addition to Ceffu’s off-exchange settlements solutions – allows institutions to access our partner exchange, Binance’s deep liquidity pools while assets remain protected in verifiable cold storage. With BlackRock’s BUIDL now integrated, clients can gain exposure to U.S. Treasury yield whilst using it as collateral on MirrorRSV.

About BlackRock’s BUIDL and How it Works

  • BUIDL was launched by BlackRock in 2024 and tokenized through Securitize – a digital securities platform.

  • BUIDL is a tokenized U.S. treasury fund managed by BlackRock, providing a stable, dollar-denominated digital asset that is fully backed by cash, U.S. Treasuries and repurchase agreements.

Ceffu clients can deposit BlackRock’s BUIDL into Ceffu's Qualified Wallet for custody, then pledge assets as collateral for trading on our partner exchange, Binance via MirrorRSV. This setup ensures assets stay in cold storage, secured by multi-party computation (MPC) and multi-approval schemes (MAS), while enabling off-exchange settlement to minimize risks.

This integration is built on Ceffu's existing RWA support for USYC from Hashnote and cUSDO from OpenEden, bringing a wider range of high-quality, compliant on-chain assets.

How Does MirrorRSV Work?

When a client initiates a MirrorRSV pledge request on Ceffu, the digital assets are locked in the client’s Qualified Wallet and cannot be withdrawn while the mirror position remains open. The Exchange then credits equivalent representative assets to the client’s Portfolio Margin account.

Once credited, clients are free to utilise the representative assets across the Exchange’s Portfolio Margin products. Throughout the entire process, the client’s original assets remain in their Ceffu Qualified Wallet and are fully verifiable on chain. Clients may request to withdraw profits from the Exchange and unpledge their representative position at any time.

Looking Ahead

As we deepen integrations with top RWA issuers and liquidity providers, our core focus remains in delivering robust security and utility for digital assets. At Ceffu, we remain committed to building innovative solutions that unlock the full utility of real-world assets.

To learn more about how Ceffu’s custody and liquidity solutions can help drive your business forward, contact us using our institutional form.


About Ceffu

Ceffu is a compliant, institutional-grade custody platform offering custody and liquidity solutions that are ISO 27001 & 27701 certified and SOC2 Type 1 & Type 2 attested. Our multi-party computation (MPC) technology, combined with a customizable multi-approval scheme, provides bespoke solutions allowing institutional clients to safely store and manage their digital assets. Institutions may also benefit from Ceffu’s secure gateway to a wide range of liquidity products within other exchanges’ ecosystems.

Media contact: pr@ceffu.com

Stay informed

LinkedIn: Ceffu

X: @CeffuGlobal