proof of ownership

noun phrase
UK /pruːf əv ˈəʊnəʃɪp/
US /pruːf əv ˈoʊnərʃɪp/

Something you show to prove that a thing belongs to you.

The receipt is proof of ownership for the new bike.


OTHER MEANINGS

2. A legal document that shows who legally owns something.

The car's proof of ownership was kept in a safe place.

3. A record that shows you paid for and now own an item.

Keep the invoice as proof of ownership for the warranty.

4. The right to claim something as yours, backed by evidence.

The painting's proof of ownership was questioned by the museum.