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

validatePool.brs

REM read more about assetPools here: http://docs.brightsign.biz/display/DOC/roAssetPool
REM read more about syncspecs here: http://docs.brightsign.biz/display/DOC/roSyncSpec

REM Sha1's should be calculated on the server and placed into an entry of the sync spec like so:
REM   <download>
REM      <name>autoplay-Project 1.xml</name>
REM      <hash method="SHA1">a8e24dcfb83a694da58bafb3ab763c07ca842baf</hash>
REM      <size>7962</size>
REM      <link>pool/a/f/sha1-a8e24dcfb83a694da58bafb3ab763c07ca842baf</link>
REM    </download>

'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