How do I prove I actually worked on a specific project?

For the O-1, you prove participation in a project by assembling documentation that verifiably attests to your role and contribution. There is no single piece of evidence that does it all: what is convincing is a coherent set of materials that reinforce each other.

The strongest documents are those that formally reference your involvement, such as contracts, credits, and official certifications. These are complemented by letters from recognized professionals in the field and supporting materials that confirm the reach of the work.

• Contracts, credits, and formal records that name your role.
• Letters from independent, respected references in the industry.
• Supporting materials: press coverage, publications, and project records.

The credibility and verifiability of the evidence carry as much weight as volume: authorities value reliable, checkable sources. Since each case is evaluated individually by the USCIS, it is worth building a consistent file and reviewing the latest guidance from the official source or with a qualified professional.

About the author

Victoria Harper

Editor-in-Chief

Meet the author

As a journalist and lead editor at Visto n’ Visa, Victoria helps ensure that immigration topics are covered in a clear, trustworthy, and easy-to-understand way. Her focus is on delivering useful, human, and relevant content for people exploring new paths abroad.