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 “Mather Brown, 7 Oct 1761 - 25 May 1831” — 43 records examined, 27 dropped by the rights gate.
Archives queried 2026-09-01 10:59 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Monsieur de St. George
William Ward · April 4, 1788
Thomas Jefferson
Mather Brown, 7 Oct 1761 - 25 May 1831 · 1786
The Meeting of Antony and Cleopatra
Giovanni Battista Tiepolo · ca. 1745–47
James Mather
William Bache, 22 Dec 1771 - 9 Jul 1845 · 1804
Lucas van Uffel (died 1637)
Anthony van Dyck · ca. 1622
George Mather
William Bache, 22 Dec 1771 - 9 Jul 1845 · 1804
Quadrula pustulosa
Artist not stated in the record
Emma Goldman
Margrethe Mather, 1886 - 1952 · c. 1915
William Bainbridge
Asher Brown Durand, 21 Aug 1796 - 17 Sep 1886 · c. 1817
Stephen Girard
M. E. D. Brown, 1810 - 1896 · 1832
Spilogale putorius interrupta
Artist not stated in the record · 7 Oct 1902
Two allegorical portraits
Giuseppe Barberi, Italian, 1746–1809 · 1746–1809
Project for the Tomb of the Maréchal de Belle-Isle
Augustin Pajou, 1730–1809 · 1761
Juncus oxymeris Engelm.
Artist not stated in the record · 25 Jul 1937
Luzula campestris (L.) DC.
Artist not stated in the record · 25 Jul 1937
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. 3 matched · 3 examined · 0 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.3 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 2952212 matched · 40 examined · 27 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 10:59 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.