Keep a record your clients confirm.

One osmarks account covers both ways of recording client work:

• A one-off delivery. Write down what you delivered and send your client one link. They confirm with their work email, and you get a signed mark.
• An ongoing lead-generation engagement. Open an engagement space with your client. Each side counts on its own side, osmarks lines the numbers up every month, and each month you both confirm is signed.

Confirmed work collects on your public Proof Page, which people and AIs can read and check.

Recording is free, with no limit. The paid part is the statistics across engagements. Every confirmed mark is signed and written to a public, append-only log. No personal data is in the log.