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. 16 shown for “C. Kuhn, acitve c. 1857” — 44 records examined, 12 dropped by the rights gate.
Archives queried 2026-09-03 16:15 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Portrait of a Man ("The Auctioneer")
Rembrandt · probably ca. 1658–62
Elisha Kent Kane
C. Kuhn, acitve c. 1857 · 1857
Roundel with Scenes of the Attack on the Castle of Love
Artist not stated in the record · ca. 1320–40
Adiantum braunii Mett. ex Kuhn
Artist not stated in the record · 1857
A Goldsmith in his Shop
Petrus Christus · 1449
Asplenium virchowii Kuhn ex C. Chr.
Artist not stated in the record
Virgin and Child with Saint Anne
Albrecht Dürer · probably 1519
Tectaria rivalis (Mett. ex Kuhn) C. Chr.
Artist not stated in the record · 19 Jan 1924
Tectaria rivalis (Mett. ex Kuhn) C. Chr.
Artist not stated in the record · 30 Jun 1973
Tectaria rivalis (Mett. ex Kuhn) C. Chr.
Artist not stated in the record · Jun 1924
Tectaria rivalis (Mett. ex Kuhn) C. Chr.
Artist not stated in the record · May 1923
Alsophila pauciflora C. Presl ex Mett. in Kuhn
Artist not stated in the record
Selaginella biformis A. Braun ex Kuhn
Artist not stated in the record · 21 Dec 1998
Tectaria rivalis (Mett. ex Kuhn) C. Chr.
Artist not stated in the record · 1 Aug 1961
Elaphoglossum deckenii (Kuhn) C. Chr.
Artist not stated in the record · 6 Aug 1949
Polystichum eximium (Mett. ex Kuhn) C. Chr.
Artist not stated in the record · 1853 to 1856
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. 4 matched · 4 examined · 0 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.4 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 1000588 matched · 40 examined · 12 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 2026-09-03 16:15 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.