I've learned that what I used to think was CIAO is instead a UNID (for me) Cuban station.
The elevator music, this would be Radio Enciclopedia, also from Cuba.
530 has many part 15 stations on it, and also some pirates. I'm not saying that that is what you caught, but could help you out sinc eits hard to ID 15's and pirates. I've caught 2 pirates on 530 before ( voice of elmer (a town south of me by 30 miles) and somebody re-transmitting the local noaa weather radio).
As for the NOAA relay, it's not unusual for licensed TIS/HAR stations to rebroadcast NOAA weather radio, so I'm guessing that wasn't a pirate that you heard. On the other hand, I'd like to learn more about this "Voice of Elmer"! I have yet to catch anything unusual on 530 myself, but then again I haven't paid much attention to the frequency since it's usually dominated here by CIAO.