Available for all five films. This is "CD quality" and can be purchased from sites like High-Resolution (24-bit): Dead Men Tell No Tales is available in 24-bit/44.1kHz ProStudioMasters
Qobuz offers both streaming and download options. You can buy the FLAC soundtrack in various resolutions. Their "Sublime" tier even gives discounts on hi-res purchases. FLAC Soundtrack - Pirates of the Caribbean
FLAC (Free Lossless Audio Codec) works like a ZIP file for music. It compresses the file size without removing a single bit of data. When you play it, it decompresses into an exact clone of the CD or Master recording. Available for all five films
Pirates of the Caribbean: who wrote the soundtrack, and ... - Classic FM and ... - Classic FM