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Persistence fixity provides a means for you to compare an on-demand digest calculation to the recorded digest values. There are two approaches to persistence fixity at the moment.
On-demand Digest Calculation
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On-demand Fixity Check
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An on-demand fixity check can be requested by making a GET request to the /fcr:fixity endpoint of a binary. This will recalculate the digests of each algorithm that is on record for the binary, and compare against those stored digests. The results of the check will be returned in an RDF serialization. See RESTful HTTP API - Fixity for usage.
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The default digest algorithm used by Fedora may be set to either SHA-512 or SHA-256, via the fcrepo.persistence.defaultDigestAlgorithm option. This will affect the default digest for binaries, and will also determine the digest algorithm used for objects in OCFL.
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