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 “Photograph of airmail planes at Washington, DC” — 64 records examined, 14 dropped by the rights gate.
Archives queried 2026-09-01 13:41 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Ruins of Gallego Flour Mills, Richmond
Alexander Gardner · 1865
Photograph of airmail planes at Washington, DC
Artist not stated in the record · 1918
Boating
Edouard Manet · 1874
Photograph of airmail plane Curtiss JN-4H
Artist not stated in the record · May 15, 1918
The Forest in Winter at Sunset
Théodore Rousseau · ca. 1846–67
Photograph of airmail plane on take off
Artist not stated in the record · May 15, 1918
The Monet Family in Their Garden at Argenteuil
Edouard Manet · 1874
Photograph of airmail planes at Omaha, Nebraska
Artist not stated in the record · c. 1927
The Adoration of the Shepherds
Andrea Mantegna · shortly after 1450
Photograph of Pres. Wilson at first regularly scheduled airmail service ceremony
Artist not stated in the record · May 15, 1918
![[President Abraham Lincoln, Major General John A. McClernand (right), and E. J. Allen (Allan Pinkerton, left), Chief of the Secret Service of the United States, at Secret Service Department, Headquarters Army of the Potomac, near Antietam, Maryland], by Alexander Gardner](/_next/image?url=https%3A%2F%2Fimages.metmuseum.org%2FCRDImages%2Fph%2Fweb-large%2FDP285633.jpg&w=3840&q=75)
[President Abraham Lincoln, Major General John A. McClernand (right), and E. J. Allen (Allan Pinkerton, left), Chief of the Secret Service of the United States, at Secret Service Department, Headquarters Army of the Potomac, near Antietam, Maryland]
Alexander Gardner · October 4, 1862
Photograph of airmail pilot E. Hamilton Lee
Artist not stated in the record · c. 1924
Virgin and Child with Saints Catherine of Alexandria and Barbara
Hans Memling · early 1480s
Photograph of airmail plane at Chicago
Artist not stated in the record · c. 1920
![[President Abraham Lincoln, Major General John A. McClernand (right), and E. J. Allen (Allan Pinkerton, left), Chief of the Secret Service of the United States, at Secret Service Department, Headquarters Army of the Potomac, near Antietam, Maryland], by Alexander Gardner](/_next/image?url=https%3A%2F%2Fimages.metmuseum.org%2FCRDImages%2Fph%2Fweb-large%2FDP254903.jpg&w=3840&q=75)
[President Abraham Lincoln, Major General John A. McClernand (right), and E. J. Allen (Allan Pinkerton, left), Chief of the Secret Service of the United States, at Secret Service Department, Headquarters Army of the Potomac, near Antietam, Maryland]
Alexander Gardner · October 3, 1862
Photograph of de Havilland airmail plane #299
Artist not stated in the record · c. 1920
Wharves at Richmond, Virginia
Alexander Gardner · 1865
Photograph of airmail pilot Lt. Torrey Webb and NYC Postmaster Thomas G. Patten
Artist not stated in the record · May 15, 1918
Ia Orana Maria (Hail Mary)
Paul Gauguin · 1891
Photograph of Army Air Corps pilots Maj. Reuben Fleet and Lt. George Boyle
Artist not stated in the record · May 15, 1918
![Confederate Soldier [on the Battlefield at Antietam], by Alexander Gardner](/_next/image?url=https%3A%2F%2Fimages.metmuseum.org%2FCRDImages%2Fph%2Fweb-large%2FDP274801.jpg&w=3840&q=75)
Confederate Soldier [on the Battlefield at Antietam]
Alexander Gardner · September 1862
Photograph of airmail planes at Omaha, Nebraska
Artist not stated in the record · c. 1924
Ruins at end of Richmond and Petersburg Railroad Bridge, Richmond
Alexander Gardner · 1861–65
Photograph of airmail plane at Reno, Nevada
Artist not stated in the record · c. 1920
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. 773 matched · 24 examined · 11 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. 3149532 matched · 40 examined · 3 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 2026-09-01 13:41 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.