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. 12 shown for “Jacob Houbraken” — 18 records examined, 0 dropped by the rights gate.
Archives queried 2026-08-28 15:51 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.Smithsonian Open Access: HTTP 429 from api.si.edu. Results from the remaining archive are shown unchanged — nothing is substituted for a source that did not answer.
Portrait with Ornamental Embellishments
Jacob Houbraken · 1728–51
Portrait of Charles Chais
Jacob Houbraken · 1765
Portrait of Charles Chais
Jacob Houbraken · 1765
Men fishing with nets in a river, from "Danubius Pannonico-Mysicus" (Volume 3)
Jacob Houbraken · 1726
Men quarrying or mining for gold, from "Danubius Pannonico-Mysicus" (Volume 3)
Jacob Houbraken · 1726
A woman standing against a cannon at right, putti in the foreground, and an elephant with a tower on its back in the background at left, from "Danubius Pannonico-Mysicus" (Volume 3)
Jacob Houbraken · 1726
Mary, Queen of Scots
Jacob Houbraken · 1738
Portrait of Thomas Howard, Earl of Arundel and Surrey
Jacob Houbraken · 1733
Jonas Witsen, Burgemeester der Stad Amsterdam
Jacob Houbraken · ca. 1749
William Shakespeare
Jacob Houbraken · 1747
Portrait of George Savile, Marquis of Hallifax
Jacob Houbraken · 1740
Sidney, Earl of Godolphin, Lord High Treasurer
Jacob Houbraken · ca. 1740
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. 18 matched · 18 examined · 0 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. HTTP 429 from api.si.edu. No records from this archive are shown for this query.Unavailable
These figures describe the pass run at 2026-08-28 15:51 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.