Why Crypto Sanctions Screening Is Moving to a Shared Layer

The sanctions screening framework for crypto assets is undergoing a structural transition. What operated for years as a set of isolated controls implemented by each exchange independently is migrating toward a shared network layer positioned between virtual asset service providers, or VASPs. This layer integrates counterparty discovery, Travel Rule messaging, and sanctions and KYT decisions on a near-real-time basis.

This does not respond to speculative trends or industry preference. It responds to a change in the compliance architecture driven by concrete regulatory signals and by the existence of commercial infrastructure already operating at scale.

The Office of Foreign Assets Control of the U.S. Department of the Treasury has instructed crypto firms since 2021 to implement risk-based programs that screen clients and transactions against sanctions lists, including the Specially Designated Nationals list. This general framework, however, is being replaced by more prescriptive provisions.

On April 10, 2026, FinCEN and OFAC issued a joint proposed rule to implement the anti-money laundering and countering the financing of terrorism and sanctions obligations of the GENIUS Act. The proposal would designate permitted payment stablecoin issuers, or PPSIs, as financial institutions under the Bank Secrecy Act.

The technically relevant aspect of this proposal is not the designation itself but the requirement that PPSIs maintain technical capabilities to block, freeze, reject, or prevent non-permissible transactions in both primary and secondary markets. The proposed rule does not impose specific technical standards – it remains technologically neutral – but it mandates the outcome: the capacity to intervene in stablecoin activity across all markets where it operates.

Between January 1, 2015, and November 21, 2025, FinCEN recorded approximately 55,000 suspicious activity reports referencing specific stablecoins, while OFAC received close to 5,800 blocked property reports and roughly 3,000 rejected transaction reports mentioning stablecoins. The Financial Action Task Force has warned that most on-chain illicit activity is currently transacted in stablecoins.

The transition toward a shared network layer does not depend exclusively on regulatory mandates. The commercial infrastructure that enables this architecture already exists and processes significant volumes.

Notabene, one of the more relevant Travel Rule infrastructure providers, reports that its network connects over 2,000 regulated entities across more than 100 jurisdictions and processes over $1 trillion in annual transaction volume. In September 2025, the company launched Notabene Flow, an open stablecoin payments and transaction authorization platform. In July 2025, it integrated counterparty sanctions screening through a partnership with Refinitiv.

These networks expose counterparty graph intelligence and generate real-time events such as sanctions.match_detected via APIs, enabling exchanges to automate execution or rejection decisions during inter-VASP transfers. The blockchain intelligence suites used by exchanges for wallet screening and VASP attribution are being integrated into these flows.

OFAC has expanded its Iran-related sanctions to include procurement networks, extending the compliance perimeter beyond designated entities. These procurement networks refer to sets of entities, individuals, and shell companies that acquire goods, services, or financial access on behalf of sanctioned parties, often across multiple jurisdictions and payment systems.

The technical challenge for traditional screening is that these networks may involve entities not yet on the SDN list but that serve sanctioned end-users. Direct counterparty screening no longer meets regulatory expectations. Firms handling cross-border flows must assess indirect exposure, examining whether upstream or downstream entities in the transaction chain have procurement links to sanctioned programs.

OFAC is advancing toward a network-based compliance model for crypto-related sanctions. This implies that platforms must review their exposure mapping capabilities and ensure that their monitoring tools can identify indirect relationships, not only direct wallet matches.

The convergence of these developments has concrete implications for the compliance architecture of the industry.

Travel Rule implementation varies across jurisdictions and protocols. The FinCEN and OFAC proposed rule establishes a comment period until June 9, 2026, and any final rule would take effect 12 months after issuance. This timeline implies that the transition will be gradual and that multiple interoperability standards will coexist for an extended period.

The effectiveness of screening in this shared network layer will depend on the capacity of VASPs to exchange compliance information in a standardized manner and on the quality of wallet attribution data available.

Blockchain analytics providers have documented how Iranian exchanges and services use stratified transaction patterns to evade detection. The mere availability of a shared network does not resolve the evasion problem. It only changes the point at which controls are applied.