Document verification

1. A system, comprising:

a processor of a user node;

a memory on which are stored machine readable instructions that when executed by the processor, cause the processor to:

mark a document to be included into a collection of documents;

determine a business process step associated with the document based on a user mark; and

execute a transaction to store a hash of the document onto a ledger of a blockchain,

wherein a Merkle tree hash is generated and tagged on the ledger with details of the business process step;

wherein responsive to the determination, construct a sequence of Merkle trees for the collection of the documents.

2. The system of claim 1 , wherein the instructions further cause the processor to upload the document to a private storage associated with the user node.

3. The system of claim 1 , wherein the instructions further cause the processor to acquire audit proofs from the tagged Merkle tree hash.

4. The system of claim 3 , wherein the instructions further cause the processor to determine if the document is a part of the business step or a part of an entire business process based on the audit proofs.

5. The system of claim 3 , wherein the instructions further cause the processor to verify that the document is added to the transaction based on the audit proofs.

6. The system of claim 1 , wherein the instructions further cause the processor to add the document to the collection of the documents based on the business process step.

7. The system of claim 6 , wherein the sequence of Merkle trees for the collection of the documents is stored on the ledger of the blockchain.

8. A method, comprising:

marking a document, by a user node, to be included into a collection of documents;

determining, by the user node, a business process step associated with the document based on a user mark; and

executing a transaction to store a hash of the document onto a ledger of a blockchain,

wherein a Merkle tree hash is generated and tagged on the ledger with details of the business process step;

wherein responsive to the determining, constructing a sequence of Merkle trees for the collection of the documents.

9. The method of claim 8 , further comprising uploading the document to a private storage associated with the user node.

10. The method of claim 8 , further comprising acquiring audit proofs from the tagged Merkle tree hash.

11. The method of claim 10 , further comprising determining if the document is a part of the business step or a part of an entire business process based on the audit proofs.

12. The method of claim 10 , further comprising verifying that the document is added to the transaction based on the audit proofs.

13. The method of claim 8 , further comprising adding the document to the collection of the documents based on the business process step.

14. The method of claim 13 , wherein the sequence of Merkle trees for the collection of the documents is stored on the ledger of the blockchain.

15. A non-transitory computer readable medium comprising instructions, that when read by a processor, cause the processor to perform:

marking a document to be included into a collection of documents;

determining a business process step associated with the document based on a user mark; and

executing a transaction to store a hash of the document onto a ledger of a blockchain, wherein a Merkle tree hash is generated and tagged on the ledger with details of the business process step;

wherein responsive to the determining, constructing a sequence of Merkle trees for the collection of the documents.

16. The non-transitory computer readable medium of claim 15 , further comprising instructions, that when read by the processor, cause the processor to upload the document to a private storage associated with a user node.

17. The non-transitory computer readable medium of claim 15 , further comprising instructions, that when read by the processor, cause the processor to acquire audit proofs from the tagged Merkle tree hash.

18. The non-transitory computer readable medium of claim 17 , further comprising instructions, that when read by the processor, cause the processor to determine if the document is a part of the business step or a part of an entire business process based on the audit proofs.

19. The non-transitory computer readable medium of claim 15 , further comprising instructions, that when read by the processor, cause the processor to add the document to the collection of the documents based on the business process step.

20. The non-transitory computer readable medium of claim 15 , wherein the sequence of Merkle trees for the collection of the documents is stored on the ledger of the blockchain.