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. 18 shown for “Free Frank cover from Citizen to Pension Office with 1c Blood local” — 46 records examined, 1 dropped by the rights gate.
Archives queried 2026-09-01 00:58 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 Crucifixion; The Last Judgment
Jan van Eyck · ca. 1436–38
Free Frank cover from Citizen to Pension Office with 1c Blood local
Artist not stated in the record · August 20, 1856
The Annunciation
Hans Memling · 1480–89
3c Washington with Blood's Penny Post carrier stamp on cover
Artist not stated in the record · 1853
Christ Crowned with Thorns (Ecce Homo), and the Mourning Virgin (Mater Dolorosa)
Adriaen Isenbrant · ca. 1530–40
World War I postcard with “nurse’s mail” frank
Artist not stated in the record · 1918
The Sacrifice of Polyxena
Charles Le Brun · 1647
3c Washington War Department cover
Artist not stated in the record · November 29, 1881
The Rest on the Flight into Egypt
Gerard David · ca. 1512–15
WWI Officer's Mail Free Frank cover
Artist not stated in the record · March 5, 1918
The Annunciation
Gerard David · 1506
Post Office Free Frank cover
Artist not stated in the record · June 30, 1860
Free Frank front from England, with a Sunday postmark
Artist not stated in the record · February 17, 1839
Free Frank cover
Artist not stated in the record · June 10
Post Office Free Frank cover
Artist not stated in the record · June 7, 1861
World War II Patriotic cover
Artist not stated in the record · December 13, 1942
Benjamin Franklin to Mary Hopkinson free franked “B Free Franklin” folded letter
Artist not stated in the record · May 9, 1766
Letter to Postmaster Dudley Woodbridge from Surveyor General Ebenezer Hazard
Artist not stated in the record · April 6, 1781
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. 6 matched · 6 examined · 0 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.6 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 5984489 matched · 40 examined · 1 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 00:58 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.