A new hash Supplemental Enhancement Information (SEI) message for the V3C/V-PCC atlas frame is described herein. The message is used to signal the hash values that are computed for the syntax elements associated with each patch. The hash SEI message is able to be used for the V3C/V-PCC tile level and optionally for atlas level conformance testing. The hash is able to be used to confirm that the decoded values by the decoder are the same as the original values that were encoded by the encoder.