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. 23 shown for “Free Frank cover” — 64 records examined, 11 dropped by the rights gate.
Archives queried 2026-09-01 01:47 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Cover
Artist not stated in the record · 1700–1800
Free Frank cover
Artist not stated in the record · 1862
Draughtsman's instruments
George Adams · 18th century
Free Frank cover
Artist not stated in the record · July 10, 1913
Potpourri bowl with cover
Artist not stated in the record · stoneware 18th century, mounts 1745–49
British Free Frank cover scrap
Artist not stated in the record · 1831
Goblet and Cover (?)
Artist not stated in the record · 700s
Post Office Free Frank cover
Artist not stated in the record · June 7, 1861
Accordion (Flutina)
Frank Colbrun · 1875
Free Frank cover
Artist not stated in the record · June 10
Sugar bowl
New England Glass Company · 1815–35
Post Office Free Frank cover
Artist not stated in the record · June 30, 1860
Cream pitcher
New England Glass Company · 1815–35
Military Civil War Free Frank cover
Artist not stated in the record · September 5
Bottle with cover (one of a pair)
Thomas Jenkins · ca. 1675
Yosemite Naval Hospital free frank cover
Artist not stated in the record · February 4, 1945
British Free Frank cover scrap
Artist not stated in the record · 1835
Pair of vases with covers
William Littler · ca. 1750–60
Free frank cover and folded letter
Artist not stated in the record · May 15, 1848
Covered Bowl
Artist not stated in the record · 1800–1830
Korean War free frank cover
Artist not stated in the record · October 7, 1953
Marble head of a Ptolemaic queen
Artist not stated in the record · ca. 270–250 BCE
Korean War free frank cover
Artist not stated in the record · December 29, 1953
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. 681 matched · 24 examined · 11 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. 87105 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 2026-09-01 01:47 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.