1

2 2

2

2

2

3

<Block 3 >

Transaction 5 Transaction 6

Previous checksum 0938

Checksum 1012

<Block 4 >

Transaction 7 Transaction 8

Previous checksum 1012

Checksum 2140

<Block 5 >

Transaction 9 Transaction 10

Previous checksum 2140

Checksum 3057

4