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. 22 shown for “Ducula carola carola” — 64 records examined, 8 dropped by the rights gate.
Archives queried 2026-09-03 07:48 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Piece
Artist not stated in the record · ca. 1830
Ducula carola carola
Artist not stated in the record
Frieda Schiff (1876–1958), Later Mrs. Felix M. Warburg
Anders Zorn · 1894
Ducula carola mindanensis
Artist not stated in the record · 27 May 1906
Triple-cased watch
Firm of Clarke & Dunster · ca. 1720
St. John the Evangelist
Capodimonte Porcelain Manufactory · ca. 1744
Ducula carola mindanensis
Artist not stated in the record · 24 Aug 1903
The Mourning Virgin
Capodimonte Porcelain Manufactory · ca. 1744
Ducula carola mindanensis
Artist not stated in the record · 29 Jun 1965
Panel of brocaded silk
Artist not stated in the record · ca. 1750
Piece
Artist not stated in the record · 18th century
Pipilo fuscus carolae
Artist not stated in the record · 16 Oct 1875
Piece
Artist not stated in the record · ca. 1820
Parotia carolae
Artist not stated in the record
Piece
Artist not stated in the record · ca. 1815
Parotia carolae
Artist not stated in the record
Piece
Artist not stated in the record · ca. 1820
Pipilo fuscus carolae
Artist not stated in the record · 25 Feb 1950
Length
Artist not stated in the record · ca. 1775–85
Pipilo fuscus carolae
Artist not stated in the record · 3 Nov 1969
Piece
Artist not stated in the record · third quarter 18th century
Pipilo fuscus carolae
Artist not stated in the record · 22 Sep 1918
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. 53 matched · 24 examined · 1 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.12 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 690 matched · 40 examined · 7 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 07:48 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.