This gist demonstrates how to validate the files in a pool against their sha1 hashes.

validatePool.brs

CreateObject("roAssetPool", pool_path As String)
pool = CreateObject ("roAssetPool", "SD:/pool") 
sync_spec = createObject("roSyncSpec")
sync_spec.readFromFile("path/to/sync.xml")

if pool.validate(sync_spec) then
  print "Files match their sha1's"
else
  print "Failure validating files"
  print pool.getFailureReason()
endif