Mass. Gen. Laws ch. 106, § 9-330
(a) Purchaser's priority: security interest claimed merely as proceeds. A purchaser of chattel paper has priority over a security interest in the chattel paper which is claimed merely as proceeds of inventory subject to a security interest if:
(c) Chattel paper purchaser's priority in proceeds. Except as otherwise provided in Section 9–327, a purchaser having priority in chattel paper under subsection (a) or (b) also has priority in proceeds of the chattel paper to the extent that: