the meaning of the claim and statue

A unique clay disk found at the Minoan site of Phaistos is often adduce as the
earliest example of printing by scholars who have defended its claim to this status
despite equivalent claims
put forward for other printing artifacts.

I cannot understand the meaning of the clause in black: what is the meaning of ‘its claim’. ‘its’ represents the ‘the clay disk’, but i cannot find the meaning of the claim and the statue because the words havemany features. [/b]