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 “Shaffron (Horse's Head Defense) of Ottheinrich, Count Palatine of the Rhine (1502–1559)” — 47 records examined, 23 dropped by the rights gate.
Archives queried 2026-09-01 17:12 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Shaffron (Horse's Head Defense) of Ottheinrich, Count Palatine of the Rhine (1502–1559)
Artist not stated in the record · dated 1529
The Rhine at Coblenz
Peixotto, Ernest Clifford · 1918-12
Escutcheon Plate with the Device of Ottheinrich, Count Palatine of the Rhine (1502–1559)
Artist not stated in the record · ca. 1525
The Rhine Looking Down Stream from Coblenz
Smith, J. Andre · 1918
Cantle Plate
Artist not stated in the record · 1563
First Americans Crossing the Rhine
Peixotto, Ernest Clifford · ca 1918
Peytral Plates
Artist not stated in the record · early 16th century
Boppard on the Rhine in the American Sector
Peixotto, Ernest Clifford · ca 1918
Peytral and Crupper Plates
Artist not stated in the record · early 16th century
Crossing the Rhine at Coblenz
Smith, J. Andre · 1918-12-13
The Rhine, Looking Upstream from Coblenz
Smith, J. Andre · 1918
Three Pommel Plates of a Saddle
Artist not stated in the record · ca. 1520–40
View of the Rhine at Boppard
Smith, J. Andre · 1918-12
Cladium mariscus (L.) Pohl
Artist not stated in the record · 7 Jul 1931
Frederick V, King of Bohemia and Count Palatine of the Rhine
Unidentified Artist · c. 1603-32
Henry Frederick, Prince of Bohemia and Prince of the Palatinate
Unidentified Artist · c. 1618
Distant View of Coblenz
Smith, J. Andre · 1918-12-16
Officer and Head of a Horse
Winslow Homer, American, 1836–1910 · 1862
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. 7 matched · 7 examined · 0 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.7 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 7389389 matched · 40 examined · 23 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 17:12 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.