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. 16 shown for “Benjamin Franklin to Mary Hopkinson free franked “B Free Franklin” folded letter” — 44 records examined, 6 dropped by the rights gate.
Archives queried 2026-08-31 23:51 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 Maid Asleep
Johannes Vermeer · ca. 1656–57
Benjamin Franklin to Mary Hopkinson free franked “B Free Franklin” folded letter
Artist not stated in the record · May 9, 1766
The Annunciation
Petrus Christus · ca. 1445
Letter enclosed in Benjamin Franklin free frank cover
Artist not stated in the record · April 13, 1765
Juan de Pareja (ca. 1608–1670)
Velázquez (Diego Rodríguez de Silva y Velázquez) · 1650
Benjamin Franklin free frank cover
Artist not stated in the record · April 13, 1765
Whalers
Joseph Mallord William Turner · ca. 1845
Presidential Widow Free Frank cover
Artist not stated in the record · March 8, 1950
British Free Frank folded letter
Artist not stated in the record · 1830
British Free Frank folded letter
Artist not stated in the record · December 9, 1829
37.5c double War of 1812 letter rate for 90-150 miles forwarded stampless cover
Artist not stated in the record · 1815
George Washington to Anne Louise DuBarry franked "President U.S." folded letter
Artist not stated in the record · August 1796
Free frank cover and folded letter
Artist not stated in the record · May 15, 1848
Free Frank cover
Artist not stated in the record · June 10
Letter to Postmaster Dudley Woodbridge from Surveyor General Ebenezer Hazard
Artist not stated in the record · April 6, 1781
Stampless Cover
Artist not stated in the record · c. 1836
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. 4 matched · 4 examined · 0 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.4 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 1440770 matched · 40 examined · 6 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 23:51 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.