SAN FRANCISCO — As digital sharing via Facebook, Twitter and other services takes deep root in everyday life, a ruling from the Ninth Circuit U.S. Court of Appeals offers yet more protection for the intermediaries that facilitate that sharing.

The decision affirmed a Central District court opinion that a file-sharing provider isn’t liable for damages caused by users transmitting copyrighted material. The three-judge panel ruled that Veoh, a sharing site showcasing media from both major and independent producers, did not have “actual knowledge” of copyright violations because Universal Music Group, the largest of the “big four” music labels, did not send a notice requesting it take down specific, copyrighted material.