What blockchain is IBM using?

Could you please elaborate on the blockchain technology IBM is currently utilizing? I'm curious to know more about the specific features and capabilities of the blockchain solution IBM has chosen for its operations. I'm also interested in understanding how this blockchain fits into IBM's broader strategic vision in the cryptocurrency and finance domain. Could you provide insights into its scalability, security, and integration with existing systems? Additionally, I would appreciate it if you could share any industry-specific use cases or partnerships IBM has formed leveraging this blockchain technology.