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 Notably, the second largest contributor of public domain compliant assets to Art UK is the Yale Center for British Art in New Haven, Connecticut. Once removed, the UK open assets total 9,810.

. Some of these assets likely overlap across platforms. For example, the Natural History Museum publishes 5,671,155 CC BY assets and 85 Public Domain Mark assets on its own website and 1,460,023 CC BY assets on Europeana, bringing the total volume to 7,131,263. Given the potential for overlap, it is possible the assets on Europeana are duplicates of assets already published to the museum's website. Some GLAMS also publish assets on more than one platform and are therefore represented multiple times in the table below.

* Platform filters limit how search returns can be sorted and/or viewed (e.g., by GLAM or rights statement). A discrepancy of 220 additional open assets on Art UK is unaccounted for in the itemized UK GLAM Sample data. This is likely due to data collection occurring over three weeks and new contributions being made by GLAMS during this time.

 GLAMs may take different approaches when publishing assets across one or more platforms, such as applying different statements (e.g., CC BY-SA on Europeana and Public Domain on Art UK ). This may be due to changes in a GLAM's policy over time or the types of standardised statements offered by a platform.



At least 35 GLAMS (or 17.9%) maintain technical protection measures that limit viewing, downloads or reuse of assets published on the website. Some implement more than one measure.

A Culture of Copyright