RightsFlow currently handles U.S. rights for 30 million songs, The Los Angeles Times reported Saturday.
YouTube, owned by Google Inc., has long had troubles with music publishers who have challenged the firm on the rights to music played in various videos, the newspaper said.
"By combining RightsFlow's expertise and technology with YouTube's platform, we hope to more rapidly and efficiently license music on YouTube," said YouTube product manager David King in an online posting.
Financial details of the acquisition were not disclosed.
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