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 “Cryptopleura brevis N.L. Gardner” — 44 records examined, 1 dropped by the rights gate.
Archives queried 2026-09-10 23:14 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Madonna and Child Enthroned with Saints
Raphael (Raffaello Sanzio or Santi) · ca. 1504
Cryptopleura brevis N.L. Gardner
Artist not stated in the record · 23 Oct 1926
Portrait of a Man
Cosimo Rosselli · ca. 1481–82
Cryptopleura brevis N.L. Gardner
Artist not stated in the record · 23 Oct 1926
Self-Portrait
Gerrit Dou · ca. 1665
Cryptopleura brevis N.L. Gardner
Artist not stated in the record · 23 Oct 1926
Cryptopleura lobulifera
Artist not stated in the record · Jul 1927
Cryptopleura lobulifera
Artist not stated in the record · Dec 1926
Cryptopleura lobulifera
Artist not stated in the record · 24 Mar 1964
Tolypothrix penicillata var. brevis N.L. Gardner
Artist not stated in the record · 28 Dec 1914
Tolypothrix penicillata var. brevis N.L. Gardner
Artist not stated in the record · 28 Dec 1914
Hassallia brevis N.L. Gardner
Artist not stated in the record · 25 Jan 1915
Aphanothece conferta var. brevis N.L. Gardner
Artist not stated in the record · 12 Feb 1915
Aphanothece conferta var. brevis N.L. Gardner
Artist not stated in the record · 12 Feb 1915 to 15 Feb 1915
Cryptopleura crispa
Artist not stated in the record · Jul 1924
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 · 1 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. 21853 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 2026-09-10 23:14 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.