Yes, indeed! When a transaction has been confirmed and included in a block on the Bitcoin blockchain, it signifies that the transaction has been digitally signed.

Each Bitcoin transaction is assigned a unique identifier known as the Transaction ID (TxID) or Transaction Hash. This identifier is derived from hashing the contents of the signed transaction data. The signed data includes information such as sender and recipient addresses, amounts transferred, digital signatures, and other relevant details.

The digital signatures within a Bitcoin transaction serve as proof that it has been authorized by the owner of the funds—the sender—using their private key(s). These signatures are essential for validating transactions on the network and ensuring their integrity.

Once a miner successfully mines a new block containing your confirmed transaction(s), it becomes an immutable part of the blockchain. This confirmation process provides further assurance that your digitally signed transactions have been recognized by network participants and permanently recorded in subsequent blocks on the blockchain.

So, in summary, when you see that your transaction's TxID or Transaction Hash has been confirmed on the blockchain, it indicates not only its inclusion but also its successful digital signing using cryptographic techniques.