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 “Free Frank cover from England signed by the Earl of Dartmouth” — 64 records examined, 5 dropped by the rights gate.
Archives queried 2026-09-06 20:21 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 Magi
Joos van Wassenhove · 1472–74
Free Frank cover from England signed by the Earl of Dartmouth
Artist not stated in the record · July 10, 1832
The Annunciation
Hans Memling · ca. 1465–70
free frank front from England with Maltese Cross in the postmark
Artist not stated in the record · June 25, 1833
Tommaso di Folco Portinari (1428–1501); Maria Portinari (Maria Maddalena Baroncelli, born 1456)
Hans Memling · ca. 1470
Letter enclosed in Benjamin Franklin free frank cover
Artist not stated in the record · April 13, 1765
Reliquary Casket with Scenes from the Martyrdom of Saint Thomas Becket
Artist not stated in the record · ca. 1173–80
Benjamin Franklin free frank cover
Artist not stated in the record · April 13, 1765
Madonna and Child
Carlo Crivelli · ca. 1480
Free Frank cover
Artist not stated in the record · June 10
Christ Crowned with Thorns (Ecce Homo), and the Mourning Virgin (Mater Dolorosa)
Adriaen Isenbrant · ca. 1530–40
Congressional Free Frank cover
Artist not stated in the record · November 21
Hermann von Wedigh III (died 1560)
Hans Holbein the Younger · 1532
Benjamin Franklin to Mary Hopkinson free franked “B Free Franklin” folded letter
Artist not stated in the record · May 9, 1766
Juan de Pareja (ca. 1608–1670)
Velázquez (Diego Rodríguez de Silva y Velázquez) · 1650
World War II Patriotic cover
Artist not stated in the record · February 11, 1943
The Crucifixion; The Last Judgment
Jan van Eyck · ca. 1436–38
Free Frank front from England, with a Sunday postmark
Artist not stated in the record · February 17, 1839
Watch in the form of a Lesser George
Nicholas Vallin · ca. 1600
Herbert Hoover free frank
Artist not stated in the record · November 7, 1929
Christ Appearing to His Mother
Juan de Flandes · ca. 1496
Alexander Hamilton free frank cover to Customs Collector Joseph Hiller
Artist not stated in the record · October 22, 1789
Man Weighing Gold
Adriaen Isenbrant · ca. 1515–20
Alexander Hamilton free frank cover to Customs Collector Otho H. Williams
Artist not stated in the record · August 13, 1793
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. 105 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. 3254844 matched · 40 examined · 5 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 2026-09-06 20:21 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.