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. 20 shown for “Post Horn in F” — 64 records examined, 35 dropped by the rights gate.
Archives queried 2026-09-01 02:48 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Flintlock Target Pistol of Prince William Frederick, Second Duke of Gloucester and Edinburgh (1776–1834), with Case and Accessories
Wogdon & Barton · 1801–3
Austrian post horn replica
Artist not stated in the record · 1866
Pair of Over-and-Under Tube-Lock Percussion Pistols with Case and Accessories
Durs Egg · ca. 1805–10; converted after 1818
Swedish post horn
Artist not stated in the record · 1800-1899
Flintlock Longrifle
Jacob Kuntz · ca. 1810–20
The Post Boy newspaper
Artist not stated in the record · March 8-10, 1719/20
Crossbow of Count Ulrich V of Württemberg (1413–1480)
Heinrich Heid von Winterthur · dated 1460
Microtus ochrogaster similis
Artist not stated in the record · 11 Apr ----
Double-Barreled Flintlock Shotgun with Exchangeable Percussion Locks and Barrels
Nicolas Noël Boutet · ca. 1818–20; exchangeable percussion locks and barrels, dated 1860
Castilleja applegatei Fernald
Artist not stated in the record · 4 Jul 1965
Pair of Flintlock Pistols of the Prince of Wales, later George IV (1762–1830), with Case and Accessories
Durs Egg · hallmarked for 1787–88
Tray for dresser set owned by Lena Horne
Artist not stated in the record · mid 20th Century
Pair of Flintlock Pistols
Johann Andreas Kuchenreuter · ca. 1760–70
14c Chief Hollow Horn Bear plate proof
Bureau of Engraving and Printing · July 28, 1931
Post Horn in F
Artist not stated in the record · ca. 1860–80
Packera dubia (Spreng.) Trock & Mabb.
Artist not stated in the record · 17 Apr 1993
Wheellock Rifle
Daniel Sadeler · ca. 1610–30
Crossbow
Artist not stated in the record · ca. 1425–75
A Brazilian Landscape
Frans Post · 1650
Snaphaunce Hunting Rifle
Jonas Schertiger the Younger · dated 1722
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. 760 matched · 24 examined · 3 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. 7461650 matched · 40 examined · 32 dropped by the rights gate. Kept only where metadata_usage.access === "CC0" and an image resource was published.8 shown
These figures describe the pass run at 2026-09-01 02:48 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.