Two 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 “Pony Express San Francisco to New York cover” — 64 records examined, 25 dropped by the rights gate.
Archives queried 2026-09-01 01:19 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Smith & Wesson .44 Double-Action Frontier Model Revolver decorated by Tiffany & Co. (serial no. 8401), with Case and Cleaning Rod
Smith & Wesson · ca. 1893

Pony Express San Francisco to New York cover
Artist not stated in the record · Aug 10, 1861

Virgin and Child
Dieric Bouts · ca. 1455–60

Pony Express patriotic cover
Artist not stated in the record · 1861

Manuel Osorio Manrique de Zuñiga (1784–1792)
Goya (Francisco de Goya y Lucientes) · 1787–88

Express Cover
Artist not stated in the record · 1862

Tiburcio Pérez y Cuervo (1785/86–1841), the Architect
Goya (Francisco de Goya y Lucientes) · 1820

Overland Mail employee's notebook
Artist not stated in the record · 1859

Josefa de Castilla Portugal y van Asbrock de Garcini (1775–about 1850)
Goya (Francisco de Goya y Lucientes) · 1804

Pony Express Rider painting
Lloyd Branson, 1853 - 1925 · 1904

José Costa y Bonells (died l870), Called Pepito
Goya (Francisco de Goya y Lucientes) · ca. 1810

Stampless Transpacific cover
Artist not stated in the record · 1852

Lion
Artist not stated in the record · after 1200

Jarrett & Palmer's Special Fast Trans-Continental Train Tickets, United States, 1876
Artist not stated in the record · 1876

Ignacio Garcini y Queralt (1752–1825), Brigadier of Engineers
Goya (Francisco de Goya y Lucientes) · 1804

Pony Express to Carson City, NV cover
Artist not stated in the record · 1862

Battle between Christians and Muslims at El Sotillo
Francisco de Zurbarán · ca. 1637–39

Express from Richmond to Louisville posted to New York cover
Artist not stated in the record · August 8, 1861

Bullfight in a Divided Ring
Goya (Francisco de Goya y Lucientes) · ca. 1810

13c Hawaiian Missionary on folded letter
Artist not stated in the record · 1852

Majas on a Balcony
Goya (Francisco de Goya y Lucientes) · ca. 1800–1810

Birch, Wambold & Backus San Francisco Minstrels
Thomas, Henry Atwell · n.d.

Terracotta amphora (jar)
Berlin Painter · ca. 490 BCE

Union Patriotic Cover with Steamship Handstamp
Artist not stated in the record · 1861-1865
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. 586 matched · 24 examined · 7 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. 1487557 matched · 40 examined · 18 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 01:19 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.