For insurers
A packet gives adjusters one record to review instead of asking you to reconstruct the basics under stress.
A useful ownership record is not just a receipt. It is a package of evidence that ties a specific guitar to a specific point in time, with enough detail to support insurance questions, resale diligence, and family transfer later.
Photos in a camera roll, invoices in email, and notes in a spreadsheet are easy to lose or separate. A proof packet consolidates those facts into one document, then makes that document easier to reference later.
A packet gives adjusters one record to review instead of asking you to reconstruct the basics under stress.
It helps a buyer understand what the instrument is, what has changed, and why your recordkeeping is credible.
It reduces the chance that a family member is left guessing which instrument is which or what paperwork exists.
The blockchain does not need your private data. What matters is anchoring the hash of the finished packet, so you can later demonstrate that the packet existed in that exact form at the recorded time.