Rather than an NFC tag prompting a phone to visit a URL in the phone's browser, I would like the NFC tag to prompt the phone to simply download an .mp3 file hosted on a server (similarly to hitting "save target as" from a browser instead of clicking on a link that would bring you to a page).
The goal in general: to have a phone scan an NFC tag and receive or hear (or have access to) an audio file, but to not have the URL of the audio file's host location to be outwardly visible, such that the link to the file location would not easily be visible or shared.
Any and all solutions would be welcome!