The phrase does not correspond to any official product. It is a piracy-oriented search query from someone seeking a high-quality, lossless version of Dutty Rock from an unauthorized source (possibly an old scene release by “SIN”). No such legitimate “FLAC iTunes” version exists because iTunes/Apple Music has never sold FLAC.
In 2022, Sean Paul's team released a digital remaster of Dutty Rock for streaming. While it’s lossy on Spotify, Qobuz and Tidal offer it in FLAC (up to 24-bit/44.1kHz). Search stores for "Dutty Rock (20th Anniversary Edition)." sean paul dutty rock flacitunesaudio sin exclusive
If you obtained this file labeled as "FLAC" but it came from an "iTunes" source, you should check the Spectral analysis. The phrase does not correspond to any official product