Ed Sheeran showed up at Manhattan Federal Court on Tuesday, the first day of a high-profile copyright trial. He is accused of stealing the famous Marvin Gaye song “Let’s Get It On” for his hit song “Thinking Out Loud.”

In his opening statement, Ben Crump, who represents the family of Gaye’s co-writer for his 1973 hit, said that the British artist played his ballad and Gaye’s song back-to-back in a medley at a concert, calling the incident a “smoking gun.”

This is the first of three trials the singer could have to go through because the two songs sound alike.

The lawyer for Townsend’s relatives said that Sheeran “recognized the magic” of Gaye’s song and “decided to capture some of that magic for himself.”

The lawyer also said, “This case is simply about giving credit where credit is due.”

Crump said that Sheeran “confessed” to stealing Gaye’s song when he played it live with “Thinking Out Loud.”

On the other hand, Sheeran’s lawyer, Ilene Farkas, said the two songs are different and told the jury that the plaintiffs shouldn’t be able to “monopolize” a chord progression and tune that are used in many songs. She added, “No one owns basic musical building blocks.”

If the jury finds Sheeran guilty of copyright infringement, the second part of the hearing will be to figure out how much he and his labels have to pay in damages.