integrity validation via hashes is needed because:
Document integrity is fundamental to public trust in archives. Yet currently that trust is built upon institutional reputation — trust at face value in a centralised authority, like a national government archive or University.But they also write that:
acceptance of content evidence might eventually become similar to acceptance of DNA evidence in court, but that establishing that level of confidence would require strong public engaged to explain Blockchain in an accessible manner particularly explaining why one could trust the cryptographic assurances inherent in a DLT solution.At least as far as courts are concerned, they're wrong about both "face value" and how trust is established. Below the fold, an explanation.