This SMPTE Registered Disclosure Document (RDD) includes specifications for the Apple ProRes bitstream syntax, the bitstream element semantics, and the decoding process used to produce decompressed images. A reference implementation that reads ProRes bitstreams from a file and decompresses the bitstreams is part of the contribution. Sample bitstreams and the resulting decompressed images have also been contributed for exercising the reference implementation. This RDD does not describe the Apple QuickTime file format or the details of storing ProRes bitstreams in QuickTime files.