Your instrument's service history, in one place.
Log every cleaning, repair, and modification.
Like cars, an instrument with a record of care holds its value better.
Simple & Secure
How It Works
Three simple steps to build a complete, transferable service history for any instrument.
- 1
Register
Add your instrument’s make, model, and serial number. Secure it with a 6-digit PIN.
- 2
Log Services
Record every repair, cleaning, and modification. Upload receipts for a complete record.
- 3
Share History
Anyone can look up an instrument’s public service history by make and serial number.
Here's what a record looks like:
Service RecordNo. HL-00428
- Instrument
- Conn 8D (Elkhart)
- Serial Number
- C0001
- Registered
- Feb 11, 2026
- Service Entries
- 7
Verified history · last service May 30, 2026
Want HornLog for your Repair Shop?
Give your customers transparency and build trust. With HornLog, your shop can log every service directly to an instrument's permanent record.
- Log services on behalf of instrument owners
- Build a verified repair history customers can share
- Stand out as a trusted, transparent shop