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 “World War II postcard” — 64 records examined, 36 dropped by the rights gate.
Archives queried 2026-09-06 17:15 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Picquigny
Frits Thaulow · 1899
World War II postcard
Artist not stated in the record · 1942-1945
The Jabach Family
Charles Le Brun · ca. 1660
World War II postcard
Artist not stated in the record · April 8, 1945
The Creation of the World and the Expulsion from Paradise
Giovanni di Paolo (Giovanni di Paolo di Grazia) · 1445
World War II postcard
Artist not stated in the record · September 18, 1945
Saber of Archduke Carl Joseph of Austria (1745–1761) as a Boy
Artist not stated in the record · dated 1751
World War II postcard
Artist not stated in the record · c. 1945
Absentee ballot request postcard
Artist not stated in the record · 1944
Patriotic postcard
Artist not stated in the record · 1943
POW postcard
Artist not stated in the record · 1945
POW postcard
Artist not stated in the record · 1945
USO postcard
Artist not stated in the record · November 27, 1943
Absentee ballot return cover
Artist not stated in the record · 1944
Absentee ballot return cover
Artist not stated in the record · 1944
Absentee ballot return cover
Artist not stated in the record · 1944
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. 918 matched · 24 examined · 20 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. 68830 matched · 40 examined · 16 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 2026-09-06 17:15 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.