Open Database License
Most downloads are works produced from the OpenStreetMap database, which is made available under the Open Database License. You can view the requirements of this license here: https://www.openstreetmap.org/copyright
For interactive maps derived from OpenStreetMap, © OpenStreetMap must appear in the corner of your map, with a link to the above License. Example code:
<a href="https://protomaps.com">Protomaps</a> © <a href="https://openstreetmap.org/copyright">OpenStreetMap</a>
If you have questions about the license, email firstname.lastname@example.org.