In short: Every piece sold on HollaJack gets its own certificate of ownership: one per physical piece, with a public page and a QR code. Each event in its life is hashed and chained to the one before, so the history cannot be quietly rewritten. Ownership moves only when the next owner accepts a transfer. The record is built to be anchored to a public blockchain later; it is not on one today.
What is a certificate of ownership for a t-shirt?
A certificate of authenticity has long accompanied original art and limited prints: a signed document saying what the work is and who made it. A HollaJack certificate of ownership does that and one more thing. It records who holds the piece now, and every time that has changed.
It is issued automatically when your order is paid. If you buy three pieces, you get three certificates, one for each, because each is a separate object with its own history.
What does the certificate record?
- The piece. Its title and image as they were at the moment of sale.
- The artist. The independent artist who made the design.
- The edition. The piece’s number in its run, shown once the order completes.
- The current owner. Shown publicly as a first name and last initial only. Full details stay private.
- The history. Every event: issued, transfer started, transfer accepted, transfer declined, transfer expired.
How can a certificate be checked?
Each certificate has a public page that anyone can open without an account, and a QR code that leads to it. If you sell or gift the piece, the new owner can scan the code and see what the piece is, who made it, its edition number and its full history. The owner can also find every certificate they hold under My Certificates in their account.
What makes the history tamper-evident?
Each event in a certificate’s life is hashed, and each hash includes the hash of the event before it. Change any past event and every hash after it stops matching. This is the same chaining idea used in blockchains and audit logs, applied to the life of one physical piece.
The certificate system was designed so that these hashes can be anchored to a public blockchain later without changing the record’s structure. That anchoring is not in place today, and HollaJack does not issue NFTs. What exists now is a chained, tamper-evident record held by HollaJack and readable by anyone.
| Compared on | Receipt | Paper certificate of authenticity | HollaJack certificate of ownership |
|---|---|---|---|
| Identifies the specific piece | Rarely | Yes | Yes, with its edition number |
| Names the artist | Sometimes | Yes | Yes |
| Shows the current owner | No | No | Yes, first name and last initial |
| Records resales and gifts | No | No | Yes, every transfer |
| Can be checked by anyone | No | Only by inspecting the paper | Yes, public page and QR code |
| Resistant to quiet edits | No | Depends on the issuer | Yes, each event is hashed and chained |
How does transferring ownership work?
- The current owner starts a transfer from their account and enters the recipient’s email address.
- The recipient gets an invitation. If they do not have an account yet, one is created for them.
- The recipient accepts or declines. Ownership moves only on acceptance. Nothing changes hands silently or by accident.
- The transfer is recorded in the certificate’s history, chained to everything before it.
This is what makes resale straightforward. A buyer of a second-hand piece can see the whole chain from the artist to them. Buyers own the physical piece and may resell it; the rights to the artwork stay with the artist, so copies are never allowed.
Why do I need an account to buy?
Because the certificate needs a home. Checkout creates an account for every buyer, and every certificate you hold lives there, ready to show or transfer.
Frequently asked questions
Is my full name shown on the public certificate?
No. The public page shows the owner as a first name and last initial only.
Is the certificate an NFT?
No. It is a hashed, chained record held by HollaJack and readable by anyone. It is designed so it can be anchored to a public blockchain later, but that is not in place today.
What happens if the person I send it to does not accept?
Ownership stays with you. A declined or expired transfer is recorded in the history and nothing else changes.
Do I get one certificate per order or per piece?
Per piece. Three pieces mean three certificates, each with its own history.
Related: what the edition number means and how piece-level records relate to the EU digital product passport.