“Stairway to Heaven” is an original — no new trial needed.

That is the upshot of an appellate court’s decision, announced Monday, which upheld a jury’s verdict that Led Zeppelin’s 1971 classic did not copy “Taurus,” a much-lesser-known song by the guitarist and singer Randy Wolfe that was recorded in 1968 by his band, Spirit.

Although Led Zeppelin had been accused of plagiarism plenty of times before, the “Stairway” case came under close scrutiny in the music industry both because the song is the band’s signature accomplishment — an eight-minute odyssey that by some estimates has earned more than $500 million — and because it followed another closely watched trial, over Robin Thicke’s song “Blurred Lines.”

In that case, Thicke and Pharrell Williams, the song’s principal writers, were ordered to pay more than $5 million to the family of Marvin Gaye, a decision that many songwriters, lawyers and academics have criticized as harmful to creativity.

In 2016, a jury in the “Stairway” case found that Jimmy Page and Robert Plant of Led Zeppelin, the song’s two credited writers, did not infringe on the copyright of “Taurus.” The band’s lawyers argued that what little the two songs had in common — a chord progression and a descending chromatic scale — were musical elements too basic to be protected by copyright. A musicologist testifying on Led Zeppelin’s behalf said that similar patterns have popped up in music for over 300 years.