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Yes, camera profiles are

Yes, camera profiles are already camera-RGB-to-sRGB, so matrix mentioned does not matter in color space conversion. It is used only in output profile calculations (this profile is embedded into TIFF files recorded by dcraw_ppm_tiff_writer())

To match camera JPEG colors you need to use same (in-camera) color profile and tonal (contrast) curve.

-- Alex Tutubalin @LibRaw LLC