Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We hereby consent to the use in the Prospectus constituting a part of this Registration Statement on Amendment No. 3 to Form S-4 of our report dated March 19, 2026 relating to the financial statements of Silverbox Corp. IV, as of December 31, 2025 and 2024, for the year ended December 31, 2025, and for the period from April 16, 2024 (Inception) through December 31, 2024, which is contained in that Prospectus. We also consent to the reference to our firm under the caption “Experts” in the Prospectus.

/s/ WithumSmith+Brown, PC

New York, New York

May 14, 2026