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. 13 shown for “Zhang Yucai” — 41 records examined, 0 dropped by the rights gate.
Archives queried 2026-08-28 13:21 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Beneficent Rain
Zhang Yucai · late 13th–early 14th century
Solanum raphanifolium Cárdenas & Hawkes
Artist not stated in the record · 17 Mar 1980
Amauropelta nitens (Desv.) comb. nov., ined 2015
Artist not stated in the record · Aug 1925
Juncus arcticus var. mexicanus Willd.
Artist not stated in the record · Dec 1937
Verbena hayekii Moldenke
Artist not stated in the record · Jan 1936
Cologania broussonetii (Balb.) DC.
Artist not stated in the record · Jan 1927
Limosella aquatica L.
Artist not stated in the record · 7 Aug 1954
Pluchea zamalloae (Cabrera) H. Rob. & Cuatrec.
Artist not stated in the record · 7 Aug 1854
Verbesina semidecurrens Kuntze
Artist not stated in the record · Jan 1927
Cystopteris diaphana (Bory) Blasdell
Artist not stated in the record · Jan 1927
Adiantum orbignyanum Kuhn
Artist not stated in the record · Aug 1925
Pellaea ternifolia (Cav.) Link
Artist not stated in the record · Jan 1927
Adiantum orbignyanum Kuhn
Artist not stated in the record · Aug 1926
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. 1 matched · 1 examined · 0 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.1 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 1260 matched · 40 examined · 0 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 13:21 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.