code: public Results verifyAllChunks(String spaceId, ChunksManifest manifest) {
  
          Results results = new Results();
          for (ManifestEntry entry : manifest.getEntries()) {
              String chunkId = entry.getChunkId();
              String checksum = entry.getChunkMD5();
              long byteSize = entry.getByteSize();
  
              try {
                  Map<String, String> props =
                      this.contentStore.getContentProperties(spaceId,
                                                             entry.getChunkId());
                  String remoteChecksum = props.get(ContentStore.CONTENT_CHECKSUM);
                  long remoteByteSize = Long.valueOf(props.get(ContentStore.CONTENT_SIZE));
  
                  if (!checksum.equals(remoteChecksum)) {
                      results.add(chunkId,
                                  "manifest checksum (" + checksum
                                  + ") does not match DuraCloud checksum ("
                                  + remoteChecksum
                                  + ")",
                                  false);
                  } else if (byteSize != remoteByteSize) {
                      results.add(chunkId,
                                  "manifest byte size (" + byteSize
                                  + ") does not match DuraCloud byte size ("
                                  + remoteByteSize
                                  + ")",
                                  false);
                  } else {
                      results.add(chunkId, null, true);
                  }
  
              } catch (Exception ex) {
                  results.add(chunkId, ex.getMessage(), false);
              }
          }
  
          if (CollectionUtils.isNullOrEmpty(results.get())) {
              throw new DuraCloudRuntimeException("failed to retrieve any chunks at list in chunk manifest:  "
                                                  + spaceId
                                                  + "/"
                                                  + manifest.getManifestId());
          } else {
              return results;
          }
      }
docs: Verifies the bytes and checksums of the chunks specified in the manifest
  match what is in DuraCloud and returns a listing of the chunks with a flag
  indicating whether the check was successful as well as an error message if it
  was not. You can use the result.isSuccess() method as a shortcut for determining
  whether all the items in the manifest matched on another.
  
  @param spaceId
  @param manifest
  @return a list of results - one for each chunk.
  @throws ContentStoreException