We are currently considering the issue of cover sheets for our repository, but these don't seem to be compatible with the use of checksums/fixity.
Cover sheets may not necessarily be added at very first ingest into the repository, meaning that once they are, the checksum of the object will change. Maybe at some stage the cover sheet will be removed, for whatever reason; maybe down the track we'll want to change the coversheet. Lots of maybes here, all amounting to the fact that if we do use cover sheets, we'll no longer be able to rely on checksums to verify the integrity of an object.
Has anybody else considered this issue?
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