Anchor a file on blockchain

Blockchain anchoring creates a timestamped, independently verifiable record of a file’s cryptographic integrity hash.

Lexkeep anchors the file’s hash—not the underlying file itself—on blockchain. Your document remains in Lexkeep’s controlled storage environment.

Anchor a file during upload

1. On the Documents page, click Add file.
2. Select or drag and drop the file you want to upload.
3. Enter an optional file name and description.

4. Ensure that Anchor on Blockchain is selected.

   This option is selected by default. Clear the checkbox if you do not want to anchor the file hash.

5. Click Upload.

Lexkeep generates a cryptographic hash for the uploaded file and processes the anchoring request.

Anchor a new file version

You can also anchor the hash of a new file version.

1. On the Documents page, locate the parent file.
2. Click the file icon with a plus sign on the file card.
3. Select the updated file and, if needed, enter an Amendment Note.
4. Ensure that Anchor on Blockchain is selected.
5. Click Upload.

Each uploaded version has its own file contents and integrity hash. Anchoring a new version does not alter or replace the anchoring record for an earlier version.

Check anchoring status

After upload, the file card on the Documents page displays the anchoring status.

You may see:

• Anchored — The file’s integrity hash has been anchored on blockchain.
• Queued — The anchoring request is waiting to be processed.

Click the displayed status to view more information about the anchoring process.

What blockchain anchoring proves

Blockchain anchoring can help demonstrate that a file’s hash was recorded at a particular point in time. If the file changes, its cryptographic hash changes.

This supports:

• Integrity verification of the file
• Detection of later modification
• A stronger timeline for file creation or preservation
• Independent verification without relying only on the platform operator

Blockchain anchoring does not publish the document itself to blockchain or make it publicly accessible.

Next step

• Verify a file