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. 15 shown for “Jacob Ritter von Hartmann” — 45 records examined, 2 dropped by the rights gate.
Archives queried 2026-09-02 04:02 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Ali Pasha (born about 1741, died 1822)
Jacob Ritter von Hartmann · 1822
Austrostipa campylachne (Nees) S.W.L. Jacobs & J. Everett
Artist not stated in the record · 26 Oct 1998
Recto: The Concert Verso: Seated Male Nude
Johann Liss · early 17th century
Paspalum depressum Steud.
Artist not stated in the record
The Triumph of Nature Over Art (design for an engraving of 'De Florum Cultura')
Pietro da Cortona (Pietro Berrettini) · ca. 1633
Saxicola dacotiae dacotiae
Artist not stated in the record · Mar 1912
Design for a Wall Decoration with the Sacrifice of Abraham and the Flight into Egypt
Giovanni Lanfranco · 1582–1647
Bromus lanceolatus Roth
Artist not stated in the record · 26 May 1901
Portrait of a Man with a Moor's Head on His Signet Ring
Conrad Faber von Creuznach
Bromus intermedius Gussone
Artist not stated in the record · 10 Apr 1902
Bromus lanceolatus Roth
Artist not stated in the record · 12 Apr 1902
Bromus scoparius L.
Artist not stated in the record · 15 Apr 1902
Crex crex
Artist not stated in the record · -- -- 18--
Cinclus cinclus aquaticus
Artist not stated in the record · 2 Sep 1887
Lanius senator senator
Artist not stated in the record · 15 May 1896
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. 5 matched · 5 examined · 0 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.5 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 44057 matched · 40 examined · 2 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 2026-09-02 04:02 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.