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. 24 shown for “Carl Heinrich Hoffmann” — 64 records examined, 11 dropped by the rights gate.
Archives queried 2026-08-27 04:24 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Pair of candlesticks
Carl Heinrich Hoffmann · ca. 1821–30
Spiraea arguta Hoffmanns.
Artist not stated in the record · 14 May 1908 to 26 Jun 1908
Saber with Scabbard and Carrying Belt
Georg Hoffmann · early 17th century
Monochaetum vulcanicum Cogn.
Artist not stated in the record · Transcribed d/m/y: 30/5/58
Schloss Milkel in Moonlight
Carl Gustav Carus · ca. 1833–35
Miconia aeruginosa Naudin
Artist not stated in the record · May 1857
Portrait of Johann Heinrich Friedrich Carl Witte
Samuel Amsler · 1819
Conostegia quadrangularis Schltdl. ex Steud.
Artist not stated in the record · Transcribed d/m/y: /4/55
Couple Entering Building, with Attendant (from Cropsey Album)
Carl Friedrich Heinrich Werner · 1850
Pimenta dioica (L.) Merr.
Artist not stated in the record · Feb 1875
Italian Lake Scene with Villa (from Cropsey Album)
Carl Friedrich Heinrich Werner · 1849
Conostegia subcrustulata (Beurl.) Triana
Artist not stated in the record
King Nut-Cracker Or The Dream of Poor Reinhold
Dr. Heinrich Hoffmann · [1846]
Miconia aeruginosa Naudin
Artist not stated in the record · Transcribed d/m/y: /5/57
Preparatory Drawing for a Print Series on the History of Germany (Die Geschichte des deutschen Volkes in fünfzehn Bildern)
Carl Heinrich Hermann · 1851–53
Conostegia subcrustulata (Beurl.) Triana
Artist not stated in the record
Preparatory Drawing for a Print Series on the History of Germany (Die Geschichte des deutschen Volkes in fünfzehn Bildern)
Carl Heinrich Hermann · 1851–53
Picramnia antidesma Sw. subsp. antidesma
Artist not stated in the record · Transcribed d/m/y: /6/57
Preparatory Drawing for a Print Series on the History of Germany (Die Geschichte des deutschen Volkes in fünfzehn Bildern)
Carl Heinrich Hermann · 1851–53
Pteris muricata Rosenst.
Artist not stated in the record · Jul 1859
Preparatory Drawing for a Print Series on the History of Germany (Die Geschichte des deutschen Volkes in fünfzehn Bildern)
Carl Heinrich Hermann · 1851–53
Campyloneurum xalapense Fée
Artist not stated in the record · Jul 1857
Preparatory Drawing for a Print Series on the History of Germany (Die Geschichte des deutschen Volkes in fünfzehn Bildern)
Carl Heinrich Hermann · 1851–53
Pityrogramma trifoliata (L.) R.M. Tryon
Artist not stated in the record
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. 204 matched · 24 examined · 5 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. 49990 matched · 40 examined · 6 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 2026-08-27 04:24 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.