At launch, Amazon offered "over 2 million songs from over 180,000 artists and over 20,000 labels, including EMI and Universal Music Group", to customers located in the United States only.[3] In December 2007 Warner Bros. Music Group announced that it would offer its catalog on Amazon MP3[14] and in January 2008, Sony BMG followed suit.Amazon's purchasable music catalog is accessible from the Amazon.com web site by searching for an artist or title name, or via a store embedded in many, but not all, of the player apps.[31][32] Customers can exchange points offered on 4 billion Pepsi bottles for, among other prizes, MP3 downloads from Warner, EMI, and Sony BMG (though not Universal).[36] Om Malik also praised the lack of DRM and the high bitrate but disliked the need to install another application to download albums."[37] A 2007 study by Eliot Van Buskirk of Wired News's "Listening Post" blog investigated whether Amazon MP3 was watermarking tracks with personal data.[39] By 2011, however, the policy had changed and certain explicitly labeled tracks embed "Record Company Required Metadata" including, among other information, unique identifiers:[40][41] Embedded in the metadata of each purchased MP3 from [Universal Music Group] are a random number Amazon assigns to your order, the Amazon store name, the purchase date and time, codes that identify the album and song (the UPC and ISRC), Amazon's digital signature, and an identifier that can be used to determine whether the audio has been modified.Amazon's official statement was "Cloud Player is an application that lets customers manage and play their own music."[48] Technology website Ars Technica noted that this is "seemingly logical" since users are uploading and playing back their own music, so the licenses users acquired from the original purchase apply to the Cloud Player in the same way they apply to transferring and playing music from an external hard drive or digital audio player.[48] Techdirt commented that the Cloud Player is "just letting people take music files they already [have], and allowing them to store and stream them from the internet."[49] Record labels reacted in shock to the Cloud Player's launch,[50] insisting that licenses were needed for this type of service.
Global availability of Amazon Music. Yellow is Amazon Music Unlimited, red-orange is Amazon Music Prime, and orange is both Amazon Music Prime and Amazon Music Unlimited