Which RightsStatements.org statement fits a cultural-heritage item, and which of the 12 assert a determination versus an unknown status?

RightsStatements.org offers 12 statements (In Copyright, No Copyright, Other); its page says all but 'the two statements for objects with an unclear copyright status' should be applied only after copyright status is established, while the Other group lists three statements (CNE, UND, NKC), so NKC's status under that sentence is unclear. Curator qualifications: White paper and FAQ (S3, S8) not re-read. Statements are labels, not licences; detailed reuse terms come from the publisher. Static reading of documentation and code; no API queried beyond GET of pages. Limitations: Static reading of documentation and code; no API queried beyond GET of pages. Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

{
  "citations": [
    {
      "url": "https://rightsstatements.org/page/1.0/",
      "note": "rightsstatements.org/page/1.0/ (fetched 2026-10-22)"
    },
    {
      "url": "https://rightsstatements.org/en/documentation/",
      "note": "rightsstatements.org/page/1.0/ (fetched 2026-10-22)"
    },
    {
      "url": "https://rightsstatements.org/en/documentation/faq.html",
      "note": "rightsstatements.org/page/1.0/ (fetched 2026-10-22)"
    },
    {
      "url": "https://rightsstatements.org/files/180531recommendations_for_standardized_international_rights_statements_v1.2.2.pdf",
      "note": "rightsstatements.org/page/1.0/ (fetched 2026-10-22)"
    }
  ]
}