Specimen Ordinary Shares Certificate, as currently effective

Exhibit 4.2

Share Certificate

BTC Digital Ltd.

Incorporated in the Cayman Islands under the Companies Law (as Revised)

Authorized Share Capital is US$1,500,000 divided into 25,000,000 Ordinary Shares of a nominal or par value of US$0.06 each.

This certifies that [Name] of [Address] is the registered holder of [Number] Ordinary Shares fully paid and non-assessable, subject to the Memorandum and Articles of Association of the Company.

GIVEN under the Common Seal of the said Company this [date].

The Common Seal of the Company was hereunto affixed.