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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.
In short, DPV is the verification that an address physically exists. Yes, you thought CASS certification did that. It doesnât. What CASS verifies is that the address presented for verification falls within a range for which a ZIP+4 has been established. For example, the post office says from 1400E through 1460E Jones St has a ZIP +4 of XXXXX-3292.