File: Attachment 20251113_News Release_StockSymbolChange.pdf

World Blockchain Corp. (formerly "Cascadia Blockchain Group Corp.")

World Blockchain Corp. Announces Ticker Symbol Change from "CK" to "WBG" on the Canadian Securities Exchange

VANCOUVER, B.C. November 13, 2025 World Blockchain Corp. (the "Company" or "WBG") (CSE: CK) is pleased to announce that its stock ticker symbol on the Canadian Securities Exchange (the "CSE") will change from "CK" to "WBG", effective at the market open on Tuesday November 18, 2025.

As a result of this change, "WBG" will now be the ticker symbol for the Company's common shares listed on the CSE. This update reflects improved and consistent brand alignment between the Company and its publicly traded equity.

No action is required by WBG's shareholders in connection with the ticker symbol change. The CUSIP number for WBG's common shares remains unchanged, and no steps need to be taken with respect to previously issued share certificates, as these are not affected by the symbol change.

The Company will continue evolving strategic direction and global focus within the blockchain sector.

For further information, please contact:

Hanxuan Wu Director info@cascadiacorp.com

www.cascadiacorp.com

The CSE does not accept responsibility for the adequacy or accuracy of this release.