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 to A. H. Markland from Second Assistant PMG McCellan” — 64 records examined, 3 dropped by the rights gate.
Archives queried 2026-08-31 23:01 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
A Hunting Scene
Piero di Cosimo (Piero di Lorenzo di Piero d'Antonio) · ca. 1494–1500
Letter to A. H. Markland from Second Assistant PMG McCellan
Artist not stated in the record · 1864
Crucifix
Master of the Orcagnesque Misericordia · 1370–75
Letter to A. H. Markland from Deputy Quartermaster General
Artist not stated in the record · 1874
The Letter
Pietro Longhi (Pietro Falca) · 1746
Letter to A. H. Markland
Artist not stated in the record · 1862
The Death of Socrates
Jacques Louis David · 1787
Enclosed letter from Graf Zeppelin A Century of Progress Flight cover
Artist not stated in the record · October 23, 1933
Doge Alvise Mocenigo (1507–1577) Presented to the Redeemer
Jacopo Tintoretto (Jacopo Robusti) · probably 1577
"First Flight Regular Mail" pouch
Artist not stated in the record · October 6, 1953
Cassone with painted front panel depicting the Conquest of Trebizond
Apollonio di Giovanni di Tomaso · after ca. 1461
Letter from Postmaster General James A. Farley to his wife
Artist not stated in the record · December 14, 1937
The Crucifixion; The Last Judgment
Jan van Eyck · ca. 1436–38
Letter from Second Assistant Postmaster General
Artist not stated in the record · 1861
Aristotle with a Bust of Homer
Rembrandt (Rembrandt van Rijn) · 1653
US Army Quartermaster's Department letter
Artist not stated in the record · November 1, 1862
View of Toledo
El Greco (Domenikos Theotokopoulos) · ca. 1599–1600
Telegram
Artist not stated in the record · 1918
The Creation of the World and the Expulsion from Paradise
Giovanni di Paolo (Giovanni di Paolo di Grazia) · 1445
Letter of Acknowledgment
Artist not stated in the record · 1921
Mantel clock with musical movement
Jean-Baptiste-André Furet · ca. 1784
Order for printing of 1882 stamp issue and postal cards
Artist not stated in the record · April 10, 1882
Woman with a Parrot
Gustave Courbet · 1866
Telegram from Praeger on September 5, 1918
Artist not stated in the record · September 5, 1918
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. 118 matched · 24 examined · 0 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. 2966461 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 2026-08-31 23:01 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.