Over the Rainbow estate sues Apple, others over “massive music piracy operation”

Forbes (yes, Forbes – they broke the story):

The son and estate of Broadway composer Harold Arlen filed a lawsuit against Apple and other businesses for selling over 6,000 unauthorized recordings of his music. Described as a “massive music piracy operation,” the lawyers claim that “Apple, Amazon, Google, Microsoft and Pandora and their distributors have joined with notorious music pirates to sell and stream thousands of pirated recordings.”

And:

According to the lawsuit, the largest digital music stores and streaming services are now flooded with unauthorized copies of Arlen’s songs that are being sold under different record labels for less than the price of the authorized copies of Arlen’s songs. For example, one online retailer is selling a song from the Jamaica cast album under the record label Soundtrack Classics for $0.99 alongside an authorized copy of the song from the RCA Victor record label for $1.29. The cover art of the Soundtracks Classics version has been doctored to remove RCA Victor’s logo.

Seems like this is more of a broken system allowing pirates to slide into the digital music streaming chain and not piracy on Apple’s part.

Is there a system in place for filing copyright claims in Apple Music? If so, did Arlen’s estate file the claims and were those claims ignored?