About the Note

Bitcoin Cash Note details

 

1. The note id

This is the production number of the note. All Bitcoin Cash Notes are produced sequentially and are marked as such.

 

2. The version number

The version number provides the exact release of the note. All changes to the note are released with a new version number – please see our changelog for details of the version history. Each release has a note id range associated with it, which is the note ids that were printed as of the particular version.

 

3. The face value

The face value is only for display purposes.

 

4. The Bitcoin Cash address

The unique public address in Bitcoin Cash address format for the note and its corresponding private key.

 

5. The QR Code

The QR code displayed on the note is an alternative ‘matrix barcode’ representation of the unique Bitcoin Cash address printed on the note. Use the QR code to conveniently capture the Bitcoin Cash address for blockchain explorer validation.

 

6. The private key & tamper-evident seal

This is where the private key for the note is sealed and where much of the note innovation and security is located. The private key is non-deterministic meaning it is unique, random and independently generated for the note. The private key is a string of random characters embedded underneath a tamper evident seal. Within the seal, the private key is further concealed with light impenetrable material. Any copies of the key made during the manufacture of the note e.g. for printing purposes, have been destroyed.

Advice for accessing the private key is below on this page.

 

7. The tamper-evident seal code

The 4 digit code printed at the top left-hand corner of the tamper-evident seal provides enhanced security against covering a tampered seal with a new seal. The 4 digit code equals the last 4 digits of the Bitcoin Cash address.

 

8. Fine-print

On the back of all of our notes, the background color has the words Bitcoin Cash repeated many times. To see these features more clearly, please use a loupe or magnifying glass.

 

9. The disclaimer

As stated on all of our notes releases, and also found in our terms and conditions.

Authenticating the integrity of a Bitcoin Cash Note

 

There are several things that you can inspect to authenticate the integrity of a note. We recommend doing this prior to obtaining Bitcoin Cash Notes from any third parties.

 

1. Inspect the note for any general irregularities that may indicate tampering or counterfeiting. Using a lamp and magnifying glass, look at every part over the note for any signs of cutting, drawing, printing or any other blemishes or irregularities. Hold the note in front of the lamp to see through the paper for any irregularities. Also check for an alterations from the original by comparing the note with another of the same version number. You can access the designs for each released version at our changelog.

 

2. Ensure that the note id printed on the note corresponds to the version number also printed on the note. You can verify this by visiting the changelog and ensuring the the note id falls within the range associated with the note version.

 

3. Validate the QR Code and Bitcoin Cash address is valid by scanning the QR code which will reveal the Bitcoin Cash address. You can conveniently use a mobile wallet such as the Bitcoin.com Wallet for scanning QR Codes. This will provide a high level of confidence that the QR Code and the Bitcoin Cash address have not been altered.

 

4. Verify that the 4 digit code printed on the top left-hand corner of the tamper-evident seal equals the last 4 digits of the Bitcoin Cash address.

 

5.  Very closely inspect in and around the tamper-evident seal for any signs of tampering – a magnifying glass and bright lamp may assist. This may include among other things cuts, abrasions, peeling, increased thickness, visible defects on the seal  or the word VOID or part of it on the seal. Pay extra special attention to inspect for any evidence of tampering around the perimeter of the seal, both on the seal and paper portion. Check the other side of the note directly opposite the seal to see if the key has been accessed from the back. Carefully shine a bright torch through the tamper seal (never directly into your eye) and look at it through the other side of the note, normally there will be a region in the center that is completely opaque. Please note that on rare occasion there are manufacturing blemishes present on the tamper seal, however they will always be only very minor.

Caring for your Bitcoin Cash Notes

 

The notes are made from durable and water resistant polymer paper, however this will only hold to a certain extent. You will need to take extra care during both storage and handling. The following precautions should hold your notes in good stead:

  • Keep your notes stored free from bending and deformation – particularly the private key! Significant deformation or agitation of the private key could potentially damage it, making it unreadable and thereby losing any associated cryptocurrency. The wallet in your pocket will certainly damage your notes and shorten its lifespan.
  • Keep your notes in a dry place away from water or moisture.
  • For extra care, keep your notes in plastic currency sleeves.

Accessing the private key of your Bitcoin Cash Note

 

To access the private key, gently peel the tamper-evident seal to expose the printed key, it can help to use tweezers and start from a corner. The key is printed in tiny text on small round label. Most people can read it with the naked eye and bright light, however if that is difficult then taking a photo with your phone and zooming the image will make it easy. When taking the photo, it is more important to not have a blurry image so keep the camera very still and avoid having the camera lens too close to the note. The most effective way is to use a magnifying glass or loupe to read it – but normally that is not necessary.

 

The following characters are never found in the private key:

  • 0 (zero)
  • O (capital o)
  • I (capital i)
  • l (lower case L)

 

The only possible characters include: 123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz