How do OAIS (CCSDS 650.0-M-3), BagIt and PREMIS 3.0 each treat fixity, and how do they fit together for audiovisual preservation packages?

The three standards fit together: OAIS defines Fixity Information conceptually (part of preservation description information) and asks archives to map practices onto its model; BagIt provides the concrete package with payload and tag manifests, where a bag is valid only when every listed checksum verifies; PREMIS 3.0 records the digest and algorithm as object characteristics and each fixity check as a dated Event with an outcome. Curator qualifications: Standards read 2026-10-22 (two from producer copies); no bag created or verified. OAIS and PREMIS verified from producer copies (hash = pin). AV specifics (PREMIS AVI example) per producer. Limitations: Standards read 2026-10-22 (two from producer copies); no bag created or verified. Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

{
  "citations": [
    {
      "url": "https://www.rfc-editor.org/rfc/rfc8493.txt",
      "note": "rfc-editor.org RFC 8493 (BagIt) definitions and sections 2.1.3, 2.2.1; producer copies oais.pdf ff8ed9a06cc... and premis3.pdf 2e3e3fe0017... = pins"
    },
    {
      "url": "https://public.ccsds.org/Pubs/650x0m3.pdf",
      "note": "rfc-editor.org RFC 8493 (BagIt) definitions and sections 2.1.3, 2.2.1; producer copies oais.pdf ff8ed9a06cc... and premis3.pdf 2e3e3fe0017... = pins"
    },
    {
      "url": "https://www.loc.gov/standards/premis/v3/premis-3-0-final.pdf",
      "note": "rfc-editor.org RFC 8493 (BagIt) definitions and sections 2.1.3, 2.2.1; producer copies oais.pdf ff8ed9a06cc... and premis3.pdf 2e3e3fe0017... = pins"
    }
  ]
}