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. 18 shown for “Zhang Ruitu” — 46 records examined, 6 dropped by the rights gate.
Archives queried 2026-08-28 22:31 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
The Red Cliff Ode, by Su Dongpo (1036-1101)
Zhang Ruitu · 17th century
Oldenlandia fastigiata Bremek.
Artist not stated in the record · 6 Sep 1962
Illustration of Su Shi’s “Second Rhapsody on Red Cliff”
Zhang Ruitu · dated 1628
Myricaria paniculata P.Y. Zhang & Y.J. Zhang
Artist not stated in the record · 9 Jul 1984
Couplet in Seven-character Meter
Zhang Ruitu
Phyllolobium sp.
Artist not stated in the record · 28 Jul 2007
Landscape
Zhang Ruitu · early 17th century
Leptochilus wrightii (Hook.) X.C. Zhang
Artist not stated in the record · 5 Aug 1927
Chinese Poems for the Twelve Months
Gion Nankai · ca. late 1730s
Dryopteris pseudocaenopteris (Kunze) Li Bing Zhang
Artist not stated in the record · Transcribed d/m/y: 12/11/35
Poem by Wang Wei
Dong Qichang · after 1632
Dryopteris pseudocaenopteris (Kunze) Li Bing Zhang
Artist not stated in the record
Dryopteris pseudocaenopteris (Kunze) Li Bing Zhang
Artist not stated in the record
Dryopteris pseudocaenopteris (Kunze) Li Bing Zhang
Artist not stated in the record
Dryopteris nodosa (C. Presl) Li Bing Zhang
Artist not stated in the record
Dryopteris pseudocaenopteris (Kunze) Li Bing Zhang
Artist not stated in the record · Feb 1894
Dryopteris pseudocaenopteris (Kunze) Li Bing Zhang
Artist not stated in the record · Feb 1913
Dryopteris pseudocaenopteris (Kunze) Li Bing Zhang
Artist not stated in the record
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 · 0 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.6 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 1193 matched · 40 examined · 6 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 22:31 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.