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 “Military Civil War Free Frank cover” — 64 records examined, 14 dropped by the rights gate.
Archives queried 2026-09-01 04:05 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Plaque with equestrian ọ́bà (king) and attendants
Ìgùn Ẹ́rọ̀nwwọ̀n (brass-casting guild) artists · ca. 1540–70
Military Civil War Free Frank cover
Artist not stated in the record · September 5
The Forest in Winter at Sunset
Théodore Rousseau · ca. 1846–67
World War I postcard with “nurse’s mail” frank
Artist not stated in the record · 1918
Plaque with Warrior and Attendants
Ìgùn Ẹ́rọ̀nwwọ̀n (brass-casting guild) artists · ca. 1540–70
Congress Free cover
Artist not stated in the record · February 25, 1973
Book cover
Artist not stated in the record · after 1651
World War II Patriotic cover
Walter T. Poppenger · November 10, 1942
Congressional Presentation Sword and Scabbard of Major General John E. Wool (1784–1869)
Samuel Jackson · 1854–55
V-Mail letter sheet
Artist not stated in the record · October 15, 1945
Life in Camp, Part 2: Drummer
Winslow Homer · 1864
V-Mail letter sheet
Artist not stated in the record · October 22, 1945
Our Scouts and Guides in 1863 at Baton Rouge, Louisiana
McPherson & Oliver · 1863
V-Mail letter sheet
Artist not stated in the record · February 13, 1945
The War – Making Havelocks for the Volunteers (from "Harper's Weekly," Vol. 5, no. 235, cover)
Winslow Homer · June 29, 1861
WWI sailor's mail free frank on Red Cross postal card
Artist not stated in the record · October 10, 1918
Don Gaspar de Guzmán (1587–1645), Count-Duke of Olivares
Juan Bautista Martínez del Mazo · ca. 1636 or later
World War II Patriotic cover
Artist not stated in the record · November 23, 1944
Mademoiselle V. . . in the Costume of an Espada
Edouard Manet · 1862
WWI Officer's Mail Free Frank cover
Artist not stated in the record · March 5, 1918
Bellona
Rembrandt (Rembrandt van Rijn) · 1633
Freedmen's Bureau cover
Artist not stated in the record · c. 1865-1872
1807, Friedland
Ernest Meissonier · ca. 1861–75
WWII military free cover with patriotic cachet
Artist not stated in the record · July 26, 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. 38 matched · 24 examined · 1 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. 191091 matched · 40 examined · 13 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 04:05 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.