Updated and corrected to reflect that Tezos’ lawyers filed an opposition to the temporary restraining order motion on Dec. 15, and that lawyers for Timothy Draper have also opposed the motion.

SAN FRANCISCO — Lawyers suing Tezos are seeking to freeze the blockchain startup’s assets, warning that “irreparable looting” may be imminent for investors who plowed what is now some $1 billion worth of cryptocurrency into accounts held by a Swiss foundation.