The cloud will generate a default RA report for your application when it is bootstrapped. You can view this report on the dashboard under the Attestation tab and verify it by clicking the Check Attestation button.
cert-chain
There are two steps needed to generate a new RA report, rather than using the default one, which allows you to prove the execution of your code.

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Config docker compose file

This Docker Compose file spins up a Jupyter Notebook environment, and importantly, it’s configured the volumes to connect to the Dstack API by mounting its socket file (/var/run/tappd.sock) into the container. This allows the Jupyter Notebook running inside the TEE to interact with the Dstack service like generate a remote attestation, get a TLS key, or generate a key for chains like ETH (ECDSA, K256 curve) or SOL (ed25519). For development convenience, this setup grants sudo privileges inside the container (environment), runs the Jupyter server with root user permissions (user), and starts the notebook with token-based authentication using the TOKEN environment variable (command). 
version: '3'
services:
  jupyter:
    image: quay.io/jupyter/base-notebook
    ports:
      - 8080:8888
    volumes:
      - /var/run/tappd.sock:/var/run/tappd.sock
    environment:
      - GRANT_SUDO=yes
    user: root
    command: "start-notebook.sh --NotebookApp.token=${TOKEN}"

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Generate RA report inside your application code

In your application, you can generate the RA report using the Dstack SDK, which supports Python, JS, and Go. The user-data argument allows you to attach your own data to the RA report. 
import { TappdClient } from '@phala/dstack-sdk';

const client = new TappdClient();

// Show the information of the Base Image.
await client.info();

// Get a TDX quote for the given custom data and hash algorithm.
const quoteResult = await client.tdxQuote('user-data', 'sha256');
console.log(quoteResult.quote); // TDX quote in hex format
console.log(quoteResult.event_log); // Event log
const rtmrs = quoteResult.replayRtmrs(); // Replay RTMRs
You can implement the above code in your application as an public API that anyone can call to generate a new RA report.

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Conclusion

In practice, this is a method to bind the RA report to your application. For example, you can generate a key pair and set the public key as the user-data. This way, anyone can verify the execution of your application by extract the public key from the RA report and checking the signature with the public key.