BlackRock has added Chronicle Labs’ Proof of Asset verification layer to its tokenized BUIDL fund, a move that shifts the product from periodic attestations toward continuous, cryptographically verifiable asset reporting. The integration is designed to provide near-real-time visibility into the fund’s underlying holdings and to create a public, tamper-evident audit trail for institutional users.
The change is significant because it gives traders, treasury teams and institutional allocators a live source of verified holdings data instead of relying on static reporting snapshots. In practical terms, that affects how market participants approach reconciliation, risk oversight and due diligence when using tokenized real-world assets in active portfolios or collateral frameworks.
We've integrated @ChronicleLabs as the Proof of Asset verification layer for the BlackRock USD Institutional Digital Liquidity Fund (BUIDL).
This unlocks deeper onchain utility for BUIDL's $2.1B in assets, enabling protocols to integrate with confidence. pic.twitter.com/S2f9Y3SICF
— Securitize (@Securitize) March 26, 2026
A continuous verification layer for a major tokenized fund
According to the reported structure, Chronicle receives holdings-level data directly from custodians and administrators, including BNY Mellon and Securitize, and turns that information into on-chain attestations published in near real time. That setup creates a continuously updated record of asset backing that can be checked by both smart contracts and human reviewers.
The fund involved is already one of the largest tokenized products in the market, with assets under management cited in the range of roughly $1.7 billion to $2.1 billion. By applying this kind of verification to a fund of that size, BlackRock is signaling that continuous proof of backing is becoming an institutional feature rather than an experimental add-on.
Chronicle’s public dashboard is meant to make those attestations accessible on an ongoing basis. As Chronicle founder Niklas Kunkel described it, the system acts as an integrity layer that offers more granular information around valuation, holdings composition, custody confirmation and the actual existence of the underlying assets.
Transparency moves from periodic disclosure to constant visibility
One of the clearest operational effects is the reduction in manual reconciliation. When holdings data is continuously verified and published in a cryptographically secured format, operations teams can spend less time matching records across systems and more time monitoring live exposures. That can reduce both overhead and the risk of reporting gaps.
The integration also changes the quality of inputs available to risk and treasury teams. With fresher and independently verifiable data, institutions can make faster decisions around exposure, liquidity and collateral integrity instead of waiting for periodic attestations to confirm the state of the fund.
That same benefit extends to on-chain use cases. Assets that can be verified continuously are easier to integrate into trading systems, collateral arrangements and smart-contract workflows because their provenance and backing can be checked on demand.
A higher standard for tokenized fund infrastructure
The broader market implication is hard to miss. When a manager of BlackRock’s scale adopts a real-time verification layer, it raises the transparency standard for other tokenized asset providers. Competing firms named in the coverage, including Franklin Templeton and WisdomTree, are likely to face growing pressure to offer similar independent verification if they want to remain competitive.
Continuous on-chain attestations move oversight away from point-in-time disclosure and closer to a model of ongoing, programmatic verification, which could gradually reshape expectations around compliance for tokenized funds.
Whether this becomes a market-wide benchmark will depend on adoption beyond BUIDL. But for now, BlackRock’s decision establishes a more demanding model for transparency in tokenized finance, one that institutions will increasingly need to evaluate if they plan to treat RWAs as actively tradable or collateral-ready instruments.
