Bank Master Data Curation, Validation: (2 possible uses cases)
1. INPUT Bank name, address etc --> RESULT: respective bank key
2. INPUT Bank Key --> RESULT: Bank name, address, etc.
Bank Key definiton is different from country to country. Some countries have an external database with the bank keys, but it seems, there is no common data source accross all countries.
Examples:
EU: Bank Code/BIC Search (ibancalculator.com)