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. 23 shown for “Invention for Improvement in Dulcimers” — 64 records examined, 30 dropped by the rights gate.
Archives queried 2026-09-05 22:16 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
David and Goliath
Francesco Fanelli · 17th century cast
Invention for Improvement in Dulcimers
Artist not stated in the record · ca 1867
Venus and Adonis
Titian (Tiziano Vecellio) · 1550s
Invention for Improvement in Rotary Printing Presses
Artist not stated in the record · ca 1847
The Crucifixion; The Last Judgment
Jan van Eyck · ca. 1436–38
Invention for Improvement in the Construction of Ordnance
Ericsson, John · 1864
Portrait of a Woman
Quinten Massys · ca. 1520
Invention for Improvement in Looms for Weaving Piled Fabrics
Artist not stated in the record · 1851
Saints Michael and Francis
Juan de Flandes · ca. 1505–9
1854 - Walter Hunt's Patent Model of a Sewing Machine
Artist not stated in the record · 1854-06-27
Traveling clock watch with alarm
Thomas Tompion · ca. 1680
Invention for Improvement in Fishing Reels
Artist not stated in the record · ca 1874
Longcase clock with calendar
Joseph Knibb · ca. 1680–85
Patent model for paper-ruling machine
Hickok, William O. · ca 1877
Queen Henrietta Maria
Anthony van Dyck · 1636
Patent Model for a Flatbed Cylinder Printing Press
Hoe, Richard March · ca 1845
Repeating Flintlock Pistol
Michele Lorenzoni · ca. 1690–1700
Sholes & Schwalbach Patent Model for Improvement in Type-Writing Machines
Artist not stated in the record · ca 1872
Longcase clock
Hermann Achenbach · ca. 1774–75
Patent Model for Paper Bag Machine
Knight, Margaret E. · ca 1879
Colt Walker Percussion Revolver, serial no. 1017
Samuel Colt · 1847
Patent Model for the Improvement in Ear-Rings
Artist not stated in the record · ca 1876
Curb Bit
Artist not stated in the record · 2nd–1st century BCE
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. 71 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. 7464592 matched · 40 examined · 29 dropped by the rights gate. Kept only where metadata_usage.access === "CC0" and an image resource was published.11 shown
These figures describe the pass run at 2026-09-05 22:16 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.