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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.
A UTR (Unique Taxpayer Reference) Number is a 10 digit number that is unique to either you or your company and youâll be presented with one when you register for self-employment.At Futurelink Group we have a wealth of experience and knowledge in providing contractor solutions.hen you or your accountant submits your self-assessment tax return, if you donât have a valid UTR Number attached to your submission it will fail. It is for these above reasons that we require all our clients to provide us with a UTR number, so make sure you keep yours safe.