However, that phrase looks like a search query or a label used for third-party proxy or mirror sites that claim to bypass network restrictions on SoundCloud. The “66” often refers to a specific proxy site (like “66 proxy” or a numbered unblocked games/site series), and “verified” may be a misleading tag to appear legitimate.
The phrase is a combination of three concepts used by students and professionals to bypass network filters:
Leo spent his lunch break hunched over a terminal in the corner of the library. He didn't use the main search engines; they were monitored. He went through a series of redirected nodes, typing in the specific string of numbers and letters he’d scribbled on his palm.
Regardless of the reason, these blocks typically work by filtering your IP address or analyzing your internet traffic for destination keywords.