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 Third Assistant Postmaster General about creation of Harding stamp” — 64 records examined, 0 dropped by the rights gate.
Archives queried 2026-08-31 22:59 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
The Adoration of the Shepherds
Andrea Mantegna · shortly after 1450
Letter from Third Assistant Postmaster General about creation of Harding stamp
Artist not stated in the record · September 14, 1923
The Adoration of the Magi
Giotto di Bondone · possibly ca. 1320
Letter from Third Assistant Postmaster General about creation of Harding stamp
Artist not stated in the record · September 14, 1923
Madonna and Child Enthroned with Saints
Raphael (Raffaello Sanzio or Santi) · ca. 1504
Man in the moon fancy cancel handstamp
Artist not stated in the record · 1870-1904
The Penitence of Saint Jerome
Joachim Patinir · ca. 1515
Horse fancy cancel handstamp
Artist not stated in the record · 19th century
Mantel clock with musical movement
Jean-Baptiste-André Furet · ca. 1784
Skull and crossbones fancy cancel handstamp
Artist not stated in the record · 19th century
Tommaso di Folco Portinari (1428–1501); Maria Portinari (Maria Maddalena Baroncelli, born 1456)
Hans Memling · ca. 1470
Devil's head fancy cancel handstamp
Artist not stated in the record · 19th century
Virgin and Child with Saints Catherine of Alexandria and Barbara
Hans Memling · early 1480s
Letter
Artist not stated in the record · June 26, 1847
View of Toledo
El Greco (Domenikos Theotokopoulos) · ca. 1599–1600
Personnel action warning form
Artist not stated in the record · 1863
Virgin and Child with Four Angels
Gerard David · ca. 1510–15
Weyanoke, LA postmaster's file John Minor Wisdom cover
Artist not stated in the record · July 10, 1957
The Flagellation
Master of the Berswordt Altar · ca. 1400
Weyanoke, LA postmaster's file Stracener & LaRose cover
Artist not stated in the record · July 3, 1957
The Crucifixion
Master of the Berswordt Altar · ca. 1400
Weyanoke, LA postmaster's file John Minor Wisdom cover
Artist not stated in the record · May 2-3, 1956
The Annunciation
Hans Memling · ca. 1465–70
Weyanoke, LA postmaster's file Louisiana National Bank cover
Artist not stated in the record · June 25-26, 1957
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. 36 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. 2978204 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 22:59 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.