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. 24 shown for “letter from Arkansas Territory stampless cover” — 63 records examined, 3 dropped by the rights gate.
Archives queried 2026-08-31 23:41 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Joan of Arc
Jules Bastien-Lepage · 1879
letter from Arkansas Territory stampless cover
Artist not stated in the record · March 3, 1832
The Crucifixion; The Last Judgment
Jan van Eyck · ca. 1436–38
25c single letter rate more than 400 miles Arkansas Territory stampless cover
Artist not stated in the record · March 3, 1832
The Flagellation
Master of the Berswordt Altar · ca. 1400
Stampless Cover
Artist not stated in the record · 1842
Battle between Christians and Muslims at El Sotillo
Francisco de Zurbarán · ca. 1637–39
Stampless Cover
Artist not stated in the record · 1850
The Crucifixion
Master of the Berswordt Altar · ca. 1400
Stampless Cover
Artist not stated in the record · 1826
Francesco d'Este (born ca. 1429, died after 1486)
Rogier van der Weyden · ca. 1460
Stampless Cover
Artist not stated in the record · 1851
An Eruption of Vesuvius
Johan Christian Dahl · 1824
Stampless Cover
Artist not stated in the record · 1828
The Swing
Hubert Robert · 1777–79
Stampless Cover
Artist not stated in the record · 1851
Saint Maurice
Lucas Cranach the Elder and Workshop · ca. 1520–25
Official stampless cover with photostat on album page
Artist not stated in the record · June 23, 1948
Still Life with Apples and a Pot of Primroses
Paul Cézanne · ca. 1890
Official stampless special delivery cover on album page
Artist not stated in the record · April 7, 1949
María Teresa (1638–1683), Infanta of Spain
Juan Bautista Martínez del Mazo · 1646
Stampless Cover
Artist not stated in the record · 1856
Pastoral Landscape: The Roman Campagna
Claude Lorrain (Claude Gellée) · ca. 1639
Folded Letter
Artist not stated in the record · 1843
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. 23 matched · 23 examined · 3 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. 503845 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 2026-08-31 23:41 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.