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. 20 shown for “Zhang Yu” — 64 records examined, 37 dropped by the rights gate.
Archives queried 2026-08-28 18:54 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Spring Clouds at the Pine Studio
Zhang Yu · dated 1366
Leptochilus henryi (Baker) X.C. Zhang
Artist not stated in the record · 2 Apr 1996
Woods and Valleys of Mount Yu
Ni Zan · dated 1372
Dryopteris pseudocaenopteris (Kunze) Li Bing Zhang
Artist not stated in the record · Sep 1937
Two Poems
Unidentified artist · n. d.
Indigofera sp.
Artist not stated in the record · 26 Jul 2006
Landscapes
Zhang Feng · dated 1644
Hedera nepalensis K. Koch
Artist not stated in the record · 9 Apr 2007
Rear View of the Mountain Villa for Watching Clouds
Yu Zouyan · 1844–45
Myricaria paniculata P.Y. Zhang & Y.J. Zhang
Artist not stated in the record · 9 Jul 1984
Landscape
Liu Yu · 1680
Pedicularis obliquigaleata W.B. Yu & H. Wang
Artist not stated in the record · 25 Jul 2007
Historical and legendary figures
Hu Zhang · 1873
Centropus bengalensis lignator
Artist not stated in the record · 20 Apr 1988
Illustration of Su Shi’s “Second Rhapsody on Red Cliff”
Zhang Ruitu · dated 1628
Acrocephalus orientalis
Artist not stated in the record · 23 Apr 1988
Couplet in Seven-character Meter
Zhang Ruitu
Peach Blossom Spring
Zhang Hong · dated 1638
Poem in Seven-syllable Meter
Zhang Fengyi
Letter to the artist’s father-in-law, Wu Yu
Wen Zhengming · datable to 1506–10
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. 91 matched · 24 examined · 5 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.12 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 4067 matched · 40 examined · 32 dropped by the rights gate. Kept only where metadata_usage.access === "CC0" and an image resource was published.8 shown
These figures describe the pass run at 2026-08-28 18:54 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.