"It was the Iranians, trust us" is not proof. The pretense that it is, is itself deeply offensive.
The United States government is at war with Iran. Sam Altman and Jeff Bezos both have significant interests in pleasing the U.S. government. It would be shocking if they weren't pushing propaganda for the U.S. government.
This isn't news. It's "Iran bad" snarling, badly disguised as journalism.
What would proof look like for you?
I suspect you don't hold other news stories to the same standards We have a claim from a company and the media is reporting on it.