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. 13 shown for “Georg Balthasar Probst, German, 1732 - 1801” — 41 records examined, 5 dropped by the rights gate.
Archives queried 2026-08-27 00:55 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
View of the Piazza dei Signori of Vicenza with horse-drawn carriages and figures walking in the square
Georg Balthasar Probst · ca. 1750–1801
Peep-show, View of the Pond Near the Shooting Garden in the Hague
Artist not stated in the record · 1732-1801
Peep-show, View of the Buyten Hof in The Hague
Artist not stated in the record · 1732-1801
Peep-show, View of the Great Bierkade, The Hague
Artist not stated in the record · 1732-1801
Peep-show, View Near the Park, Toward the Bridge of Leyden in The Hague
Artist not stated in the record · 1732-1801
The Outskirts of Amsterdam
Georg Balthasar Probst, German, 1732 - 1801 · 1750–75
Peep-Show Print, View of the Bassin des Suisses, Versailles
Georg Balthasar Probst, German, 1732 - 1801 · ca. 1775
Prospectus arcis regia versus locum ad stationes mutandas
Georg Balthasar Probst, German, 1732 - 1801
A North West View of St Pauls Cathedral London
Georg Balthasar Probst, German, 1732 - 1801
Prospectus Castelli Versaliensis, at latus hortense ex adverso Sacelli (View of the Palace of Versailles, from the Gardens opposite the Chapel)
Georg Balthasar Probst, German, 1732 - 1801
Prospectus Armamentarii regii versus arcem Principis Regis (View of the Royal Armory opposite the Prince's Palace)
Georg Balthasar Probst, German, 1732 - 1801
Vuë de la Place du Château Impérial à Nuremburg (View of the Imperial Castle Square in Nuremburg)
Georg Balthasar Probst, German, 1732 - 1801
Prospectus Propylaei Sedis Mediolanensis Ducis (View of the Entrance to the Ducal Residence in Milan)
Georg Balthasar Probst, German, 1732 - 1801
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. 1 matched · 1 examined · 0 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.1 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 205863 matched · 40 examined · 5 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 2026-08-27 00:55 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.