This is stated in a message posted on NASA's Twitter page.

CAPTURED! @Astro_Jessica and @AstroDrewMorgan have successfully captured the @SpaceX Dragon at the @Space_Station at 6:25 am ET! Installation coverage will begin at 8am ET.

- NASA (@NASA) March 9, 2020

It is noted that the ship delivered about two tons of cargo to the ISS

As SpaceX reported, the ship was launched on March 7th.