OpenTwo archives, queried live.
Every record below comes from The Met or Smithsonian Open Access and was filtered on that archive’s own rights field before it reached this page. 16 shown for “Cao Jian” — 46 records examined, 22 dropped by the rights gate.
Archives queried 2026-08-28 22:42 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Landscapes in the Styles of Various Artists
Cao Jian · dated 1716
Tetrastigma sp.
Artist not stated in the record · 18 Mar 2003
Night-Shining White
Han Gan · ca. 750
Tetrastigma beauvaisii Gagnep.
Artist not stated in the record · 16 Mar 2003
Album of painting and calligraphy for Maoshu
Various artists · 1666–80
Vitis sp.
Artist not stated in the record · 16 Mar 2003
The Cassia Grove Studio
Wen Zhengming · ca. 1532
Tetrastigma hemsleyanum Diels & Gilg
Artist not stated in the record · 20 Mar 2003
Schefflera elliptica (Blume) Harms
Artist not stated in the record · 20 Mar 2003
Brassaiopsis glomerulata (Blume) Regel
Artist not stated in the record · 20 Mar 2003
Panicum repens L.
Artist not stated in the record · 17 Aug 1892
Davallia divaricata Blume
Artist not stated in the record · Feb 1925
Angiopteris elliptica Alderw.
Artist not stated in the record · Feb 1925
Dalrympelea pomifera Roxb.
Artist not stated in the record · 15 Feb 1931
Arachniodes speciosa (D. Don) Ching
Artist not stated in the record · 7 Apr 1998
Ischaemum rugosum Salisb.
Artist not stated in the record · 1 Oct 1954 to 31 Oct 1954
Where these records came from.
Two archives are wired, and only two. Each one is filtered on its own rights field — never on a title match, and never on the presence of an image file.
- The Met Collection API (Open Access)Rights field:
isPublicDomain. 6 matched · 6 examined · 2 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.4 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 256 matched · 40 examined · 20 dropped by the rights gate. Kept only where metadata_usage.access === "CC0" and an image resource was published.12 shown
These figures describe the pass run at 2026-08-28 22:42 UTC, during this request. A completed pass is kept for 24 hours and replayed for an identical search, which is what keeps repeated queries inside Smithsonian’s 30-requests-per-hour allowance. A pass in which either archive failed to answer is never kept — an outage must not be replayed as though it were a finding about the catalogue.
Wikimedia Commons and the Library of Congress are deliberately not wired. Wikimedia was confirmed, on a live query, to return CC-BY material inside the same result set as genuine public domain works, and filtering it safely has not been designed yet. loc.gov was blocked by bot detection during the source evaluation, so its rights vocabulary has never been observed — and nothing here is built on a field nobody has read.
An image file is a rights claim. It never travels without its field.