code: public boolean check() throws IOException, TrustyUriException {
  		TrustyUriModule module = ModuleDirectory.getModule(r.getModuleId());
  		if (module == null) {
  			throw new TrustyUriException("ERROR: Not a trusty URI or unknown module");
  		}
  		return module.hasCorrectHash(r);
  	}
docs: Checks whether the content matches the hash of the trusty URI.
  
  @return true if the content matches the hash