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 “5c Greenleaf and Company revenue stamp single” — 59 records examined, 7 dropped by the rights gate.
Archives queried 2026-08-31 23:20 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Smith & Wesson .44 Double-Action Frontier Model Revolver decorated by Tiffany & Co. (serial no. 8401), with Case and Cleaning Rod
Smith & Wesson · ca. 1893
5c Greenleaf and Company revenue stamp single
Artist not stated in the record · 1864
Clarinet in C
Graves & Company · ca. 1845
3c Greenleaf and Company revenue stamp single
Artist not stated in the record · 1864
Circus Sideshow (Parade de cirque)
Georges Seurat · 1887–88
5c New York Match Company revenue stamp single
Artist not stated in the record · 1872
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Clarinet in E-flat
Ferdinand Zogbaum · ca. 1855
5c Samuel Hart and Company revenue stamp single
Artist not stated in the record · 1866
Second Corps Hospital, Washington, D.C.
Mathew B. Brady · ca. 1863
5c New York Consolidated Card Company revenue stamp single
Artist not stated in the record · 1876
Pocket chronometer
François Czapek · ca. 1850–55
5c Paper Fabrique Company revenue stamp single
Artist not stated in the record · 1873
Pair-case watch
Thomas Tompion · 1682–83
5c Russell, Morgan and Company revenue stamp single
Artist not stated in the record · 1881
Flintlock Gun of Louis XIII (1601–1643), King of France
Pierre Le Bourgeois · ca. 1620
5c Documentary Express revenue stamp single on Adams Express Company’s receipt
Artist not stated in the record · February 6, 1863
Winchester Model 1894 Takedown Rifle (serial no. 311946) with Box of Sights
Winchester Repeating Arms Company · 1906
5c Documentary Inland Exchange revenue stamp single on marriage certificate
Artist not stated in the record · September 14, 1871
The Death of Cleopatra
Guido Cagnacci · ca. 1645–55
5c Documentary Inland Exchange revenue stamp single on marriage license
Artist not stated in the record · January 26, 1864
Double Spout and Bridge Bottle
Artist not stated in the record · 7th–5th century BCE
5c Victor E. Mauger and Petrie revenue stamp single
Artist not stated in the record · 1877
Poems on painting plum blossoms and bamboo
Zhao Mengjian · dated 1260
5c Lawrence and Cohen revenue stamp single
Artist not stated in the record · 1865
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. 19 matched · 19 examined · 7 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. 1470538 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 23:20 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.