"it is likely We Are Not Alone"
We aren't. The Hubble Deep Field experiment demonstrated without a shred of doubt that there is not a single point in our sky, to whatever point precision you wish to define, that does not have dozens or hundreds of galaxies in the distance.
So there are galaxies everywhere, and water everywhere as well. There is life out there, I have no doubt about that. The only real question is : how far away is it ?
I applaud this poetic effort. It was a nice gesture. Now explain to me how an intelligent civilization with a technical level equal to ours is going to be able to detect that signal from 20 light-years away and get anything meaningful out of it. Then, as an exercise, calculate the intensity of the signal 2000 LY away, then 20,000 LY away.
At what point does it become meaningless noise ?
I'm guessing that Alpha Centauri will already have trouble detecting the signal, not to mention deriving the music from it.