Jack Dorsey’s payments company wants a federal vault, not a checking account.

On September 8, Block, Inc. (NYSE: XYZ) said it filed with the Office of the Comptroller of the Currency to charter Builders Bank & Trust, N.A. — an uninsured national trust bank. If the OCC says yes, the entity would sit under federal supervision and do custody and fiduciary work for bitcoin, stablecoins, and other digital assets. It would not take deposits, not make loans, and not carry FDIC insurance. It does not open until the OCC approves. An application is a queue ticket. It is not a bank.

What the charter is for

Block already moves crypto. Cash App and related rails have run digital-asset activity for years under a pile of state money-transmitter and virtual-currency licenses — more than 50 in some coverage — with on the order of $10.7 billion in bitcoin volume in 2025 and about two million monthly crypto users by mid-2026. A lot of that bitcoin is already self-custodied. KeyBanc’s read was blunt: the charter is less “we just learned how to hold keys” and more federal preemption. One OCC rulebook instead of a 50-state patchwork as the book scales.

The proposed three-year de novo plan is narrow: custody of bitcoin and other digital assets; customer buys and sells on a riskless principal basis; stablecoin settlement and transfer. Headquarters in filings is Sioux Falls, South Dakota, no branches. Block has asked the OCC to waive the usual “one director within 100 miles” rule. Lee Woolley, Block’s digital-asset strategy lead and a former Northern Trust / BNY Mellon / Treasury Department FCU executive, would be president and CEO. He sold the filing as economic empowerment plus Square Financial Services muscle. Square Financial Services is a separate industrial loan company. Builders Bank would be a different charter, not a rebrand of the ILC.

The crowd at the OCC window

This is not a lone wolf. Crypto and fintech names have been lining up for national trust charters as Washington opened a clearer path for digital-asset custody under federal watch. Block’s announcement landed the same day Chime moved on a sponsor-bank deal of its own. The product category is the same one BitGo already occupies for ETF wrappers and that every issuer pitching “institutional custody” has to explain to a consultant: who is the qualified custodian, and which statute are they under?

A national trust bank answers that with an OCC letterhead. It does not make Block a commercial bank. Customers of Builders Bank would not get deposit insurance. Fiduciary custody is a different liability stack. Anyone confusing this with “Cash App is now a bank” is reading the press release wrong.

What approval would change — and what it would not

Change: Block can market bitcoin and stablecoin safekeeping as a federally supervised trust activity, argue preemption against state examiners, and sit in the same conversation as other OCC-trust crypto custodians. Dorsey’s long bitcoin brief finally has a bank-shaped box around the keys.

Would not change: bitcoin’s monetary policy, Cash App’s consumer app, or the fact that Square Financial Services already exists. Would not guarantee the OCC says yes. Trust-charter applications die in comment letters, capital plans, and BSA exams. Uninsured + crypto is still a political object in a midterm year.

The institutionalization line is real and boring, which is how banking charters are supposed to sound. Custody is moving from state MTLs and privately branded wallets toward federal fiduciaries. Block just joined the queue. The interesting date is not September 8. It is the day — if it comes — that Builders Bank is allowed to hold the first bitcoin under an OCC trust certificate. Until then it is a filing, a CEO title, and a Sioux Falls address.