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. 19 shown for “Synallaxis frontalis frontalis” — 51 records examined, 2 dropped by the rights gate.
Archives queried 2026-09-04 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.
Figure 9: A study of m. frontalis in maximum contraction
Guillaume-Benjamin-Amand Duchenne de Boulogne · 1854–56, printed 1862
Synallaxis frontalis frontalis
Artist not stated in the record · 21 Feb 1901
Figure 10: Showing the expressive lines of m. frontalis in a young girl
Guillaume-Benjamin-Amand Duchenne de Boulogne · 1854–56, printed 1862
Synallaxis frontalis frontalis
Artist not stated in the record · 19 Jul 1920
Figure 8: Contraction of the right m. frontalis.
Guillaume-Benjamin-Amand Duchenne de Boulogne · 1854–56, printed 1862
Synallaxis frontalis frontalis
Artist not stated in the record · 18 Feb 1921
Figure 60: Fright
Guillaume-Benjamin-Amand Duchenne de Boulogne · 1854–56, printed 1862
Synallaxis frontalis frontalis
Artist not stated in the record · 30 Jul 1920
Figure 62: Terror, semiprofile
Guillaume-Benjamin-Amand Duchenne de Boulogne · 1854–56, printed 1862
Figure 21: Painful recollection and recollection or calling something to mind
Guillaume-Benjamin-Amand Duchenne de Boulogne · 1854–56, printed 1862
Figure 57: Astonishment, stupefaction, amazement
Guillaume-Benjamin-Amand Duchenne de Boulogne · 1854–56, printed 1862
Figure 56: Surprise
Guillaume-Benjamin-Amand Duchenne de Boulogne · 1854–56, printed 1862
Figure 66: Head of Arrotino (the spy, the knife grinder, and so on)
Guillaume-Benjamin-Amand Duchenne de Boulogne · 1854–56, printed 1862
Synallaxis frontalis frontalis
Artist not stated in the record · 1880
Figure 26: Expression of painful attention and attention, attentive gaze.
Guillaume-Benjamin-Amand Duchenne de Boulogne · 1854–56, printed 1862
Synallaxis frontalis frontalis
Artist not stated in the record · Apr 1860
Figure 39: The attention attracted by an object that provokes lascivious ideas and desires.
Guillaume-Benjamin-Amand Duchenne de Boulogne · 1854–56, printed 1862
Synallaxis frontalis frontalis
Artist not stated in the record · 11 Apr 1921
Synallaxis frontalis frontalis
Artist not stated in the record · 30 Jul 1920
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 · 0 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.11 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 3241 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 2026-09-04 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.