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. 14 shown for “Nivenia dispar N.E. Br.” — 42 records examined, 20 dropped by the rights gate.
Archives queried 2026-09-08 19:42 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Sea monster
Severo Calzetta da Ravenna · ca. 1500–1510
Nivenia dispar N.E. Br.
Artist not stated in the record · 3 Feb 1987
Sea monster
Severo Calzetta da Ravenna · early 16th century
Nivenia stokoei (L. Guthrie) N.E. Br.
Artist not stated in the record · 27 Feb 1985
Nivenia stokoei (L. Guthrie) N.E. Br.
Artist not stated in the record · 4 Feb 1986
Nivenia concinna N.E. Br.
Artist not stated in the record · 31 Jan 1986
Nivenia stokoei (L. Guthrie) N.E. Br.
Artist not stated in the record · Apr 1986
Telosma africana (N.E. Br.) N.E. Br.
Artist not stated in the record
Erica nivenia Andrews
Artist not stated in the record · 1 Apr 1897
Erica nivenia Andrews
Artist not stated in the record · 1884
Telosma africana (N.E. Br.) N.E. Br.
Artist not stated in the record · Transcribed d/m/y: 8/2/11
Telosma africana (N.E. Br.) N.E. Br.
Artist not stated in the record · Nov 1967
Telosma africanum (N.E. Br.) N.E. Br.
Artist not stated in the record · 16 Apr 1963
Caralluma speciosa (N.E. Br.) N.E. Br.
Artist not stated in the record · 18 May 1962
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. 2 matched · 2 examined · 0 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.2 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 59086 matched · 40 examined · 20 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 2026-09-08 19:42 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.