That’s an ISRC code. What’s an ISRC code? It’s a sort of fingerprint of a digital recording. The “US-S4P” part is what signifies me. I’m guessing the US part is a country code and the “S4P” is just an identifier. The “08” repesents the year of the release and the 5 digits after that is assigned by me to each track I release.
The number shown in the title is “Never Gonna Stop Me”.
Radio stations use this code to assist them in reporting royalty payments to the artist. Since I’m new to this, I’m sort of learning as I go and documenting the process.