How did VK implement a new music player without links to audio files?

Question

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Perhaps many have already noticed that VKontakte protected itself from downloading music from the site :)
In addition to the link to the stub ( https://vk.com/mp3/audio_api_unavailable.mp3 ), during music playback, no other links are observed in requests to the service. Therefore, the file cannot be downloaded directly.
But in the audio file data, there are now two additional hashes for each entry, for example: /d368bca7d6b3c83a8a/5a23c09197691e9d7d.
But the music is played on the site and it is very curious how such a mechanism is implemented?
UPD There is a solution: How now to get a link to mp3 when parsing vk.com (Vkontakte)?

Answer 1

take.ms/Jld28

Answer 2

Everything is there. The request went to this address when I decided to rewind the song:
https://cs9-5v4.vk.me/p5/df659a97832598.mp3