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. 21 shown for “Photograph of airmail hanger at Iowa City, Iowa” — 59 records examined, 38 dropped by the rights gate.
Archives queried 2026-09-01 13:34 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Christ's Descent into Hell
Hieronymus Bosch
Photograph of airmail hanger at Iowa City, Iowa
Artist not stated in the record · 1921
Barbara Claes (died 1663, called “Malle Babbe”)
Frans Hals
Photograph of airmail hanger in North Platte, Nebraska
Artist not stated in the record · c. 1924
Madonna and Child
Giovanni Bellini · late 1480s
Photograph of postal clerk sorting airmail
Artist not stated in the record · c. 1920
The Last Judgment
Joos van Cleve · ca. 1525–30
Photograph of airmail hanger at Rock Springs, Wyoming
Artist not stated in the record · c. 1920
The Horse Fair
Rosa Bonheur · 1852–55
Airmail schedule dispatch board
Artist not stated in the record · c. 1918-1929
Frederick Langenheim Looking at Talbotypes
W. & F. Langenheim · ca. 1849–51
Photograph of airmail pilot Dean Smith
Artist not stated in the record · c. 1924
![[Portrait of T'sow-Chaoong], by Unknown](/_next/image?url=https%3A%2F%2Fimages.metmuseum.org%2FCRDImages%2Fph%2Fweb-large%2FDP332552.jpg&w=3840&q=75)
[Portrait of T'sow-Chaoong]
Unknown · 1845–47
Photograph of airmail plane at Reno, Nevada
Artist not stated in the record · c. 1920
Narcisa Barañano Gayoso de Goicoechea
Goya (Francisco de Goya y Lucientes) · ca. 1805
Lepidium perfoliatum L.
Artist not stated in the record · 2 Jun 1958
Madonna and Child with Saints Francis and Jerome
Francesco Francia · 1500–10
Photograph of airmail planes at Cleveland, Ohio
Artist not stated in the record · 1921
Market by the Seashore
Salomon van Ruysdael · 1637
Sioux City Corn Palace Owney tag
Artist not stated in the record · 1891
Coreopsis lanceolata L.
Artist not stated in the record · 18 Jul 1953
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. 19 matched · 19 examined · 9 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.10 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 3058416 matched · 40 examined · 29 dropped by the rights gate. Kept only where metadata_usage.access === "CC0" and an image resource was published.11 shown
These figures describe the pass run at 2026-09-01 13:34 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.