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. 21 shown for “Du Casse” — 51 records examined, 2 dropped by the rights gate.
Archives queried 2026-08-27 05:12 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Engraving of a Design for a Sword Hilt
Du Casse · 1844–46
Phyllanthus montis-fontium M. Schmid
Artist not stated in the record · 7 Dec 1950
Engraving of a Design for a Sword Hilt
Du Casse · 1844–46
Xanthostemon sp.
Artist not stated in the record · 9 Mar 1951
Engraving of a Design for a Sword Hilt
Du Casse · 1844–46
Ginkgo biloba L.
Artist not stated in the record · 6 Mar 1949
Engraving of a Design for a Sword Hilt
Du Casse · 1844–46
Pycnandra francii (Guillaumin & Dubard) Swenson & Munzinger
Artist not stated in the record · 9 Mar 1951
Madonna and Child
Francesco Francia · 1490s
Olfersia cervina (L.) Kunze
Artist not stated in the record · 8 Jan 1897 to Jan 1898
The Annunciation
Budapest Master
Baloghia montana (Müll. Arg.) Pax
Artist not stated in the record · 12 Jun 1950
The Triumph of Time over Fame
Artist not stated in the record · ca. 1500–1530
Didymoglossum angustifrons Fée
Artist not stated in the record · 11 May 1904
Landscape
Alexandre-Gabriel Decamps · ca. 1840
Cyathea grandifolia Willd. var. grandifolia
Artist not stated in the record · 4 Apr 1904
The Experts
Alexandre-Gabriel Decamps · 1837
Saccoloma domingense (Spreng.) C. Chr.
Artist not stated in the record · Jun 1903
Didymoglossum hymenoides (Hedw.) Copel.
Artist not stated in the record · 1893 to 1895
Cyathea grandifolia Willd. var. grandifolia
Artist not stated in the record · pres que conte l'amme 1894 17
Blechnum binervatum (Poir.) C.V. Morton & Lellinger
Artist not stated in the record · 1893 to 1895
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. 11 matched · 11 examined · 2 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.9 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 55081 matched · 40 examined · 0 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 05:12 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.