D-KaP Call — the EpochCore product that turns every recorded rep-to-client call into a tamper-evident supervision record — captures who spoke, when, how long, plus a one-way fingerprint of the transcript. FINRA Rule 3110 supervision evidence on demand.
FINRA Rule 3110 says broker-dealers must supervise representative communications. Your firm records every client call. Years later your FINRA examiner asks for the recording of a specific call — and proof the recording is the original, not edited after the fact.
Your phone vendor has the audio. But your examiner is asking a different question: how do you know the recording you produced today is the same one your rep made in 2024? Most firms cannot answer cleanly. The vendor's word is not evidence; vendor systems can be re-indexed, files can be re-transcoded.
Call sits next to your existing call-recording system. Every time a call closes, you POST the metadata (rep ID, client identifier, start/end timestamps, call ID) plus a one-way fingerprint of the audio file or transcript to a single endpoint. The service seals that record with a tamper-evident signature and timestamp. The audio stays with your vendor; only the fingerprint goes to us. Months or years later your examiner asks for a specific call — you hand them the original audio, the sealed receipt, and a verifier. They confirm in seconds that the audio they are listening to is byte-for-byte the same audio your rep made at the time, and that the receipt has not been touched since.
Add a one-line webhook that fires when a call ends. The webhook POSTs the call metadata and audio fingerprint to our endpoint with your API key. Most vendors (RingCentral, NICE, Verint, Twilio) support outbound webhooks out of the box.
The endpoint returns a sealed receipt within seconds. Store it next to the call recording in your archive (S3, vendor portal, or your compliance data warehouse).
When FINRA asks for a specific call's evidence chain, export the audio plus the sealed receipt. The examiner runs the open verifier — the receipt signatures hold and the audio fingerprint matches the file. Done.
Example: A mid-size broker-dealer's rep takes a client call discussing a non-traded REIT recommendation. Eighteen months later the client files an arbitration claim alleging the rep misrepresented the product. The CCO produces the original recording from the vendor archive plus the Call receipt sealed at the time of the call. Opposing counsel runs the open verifier — the signatures hold and the audio fingerprint matches byte-for-byte. The recording is admitted without dispute. The arbitration turns on what was said, not on whether the recording is genuine.
A single FINRA 3110 documentation finding costs the median broker-dealer between $25,000 and $100,000 in remediation and supervision uplift — before you add the regulator's fine. One $29 seal per call eliminates the "did the recording get edited?" line of questioning entirely. For most firms, the math works after the first arbitration request.
Adds an invisible stealth watermark keyed to your firm on the exported receipt. The watermark survived 90 of 136 measured attack vectors in our test matrix at SSIM 0.985 (visually identical to the original) with zero false-positive matches. Stays attached through screenshots and re-uploads. If a receipt is ever leaked or quoted in another proceeding, you have a machine-readable trace back to your firm. Not "uncopyable" — a determined attacker can still scrub it — but tamper-evident in the ways FINRA, arbitration counsel, and litigation matter. MEASURED