Can Unearthed Raptor copy multiple deathrattle effects?

Solution 1:

Yes it can copy multiple Deathrattle effects.

I saw a video of 1 Raptor filling one side of the field with cards after dying because of multiple copied effects (combination with Bran, Brewmaster and Faceless)

Solution 2:

Yes it can.

In fact it can copy up to 16 deathrattle effects.

Source:

Twitter - Thanks Rob