Always use verify procedures to ensure that data transfers were performed successfully, especially when you transfer over the network. Use diff -r on UNIX systems to detect differences between your target and source data quickly. Make use of build-in verify procedures in CD-R or DVD-R burner software. To be 100% sure mount the ready medium on a different host and run an additional verify to the source data.
It's recommended to use a version control or at least manually set version numbers on your data that are increased after each update or change. Every speech corpus documentation must contain a change log where all changes are documented together with the corresponding version number. We recommend a two-part version number X.Y where X is increased only after major changes that imply that for instance software which uses the corpus has to be adapted, while Y is increased for error corrections (updates) only.
If possible, set up a mailing list of all users of the speech corpus and inform them about version changes automatically.