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The more basic article on Bitcoin Addresses may be more appropriate. A Bitcoin address is a 160-bit hash of the public portion of a public/private ECDSA keypair. Using public-key cryptography, you can sign data with your private key and anyone who knows your public key can verify that the signature is valid.
Qualifier (UNB 0007) Refers to the logical address (0004/0010). Examples of logical addresses: LOGICAL ADDRESS UNB 0004/0010 094200009999999999YYYYYY Where. in this case a special agreement has to be established. Internal code per company (UNB 0008(0014) Can be used to address a unit/business process within a company. Logical addresses with the qualifier OD are in accordance with the former rules for the logical address.