An ISRC identifies a recording, and it is permanent. One code per recording, assigned once, never reused for anything else and never replaced. If the same recording goes out on CD with one code and on streaming with another, it becomes two recordings in every system that matters: SoundExchange, radio airplay logs, Content ID, Gracenote. Royalties split across the two and neither half looks like a hit.

A UPC identifies a product, not a disc. Act One, Act Two and the deluxe double are three products, so three UPCs, even though only two discs exist.

• ISRC: our own registrant prefix, held by Boomfox Productions LLC through the US ISRC Agency (usisrc.org, purchased Sept 21 2026, $95 one time, good for life and up to 100,000 codes a year). We assign our own codes. We do not let a distributor or a mastering engineer assign them for us, because a borrowed prefix ties our catalog to their company.
• Prefix on file: QTA6R, allocated to Boomfox Productions LLC on Sept 21 2026. Codes read QT-A6R-YY-NNNNN, where YY is the year the code was assigned, not the year the song was recorded.
• Master list: MCA Drive → Admin folder. Every code, every recording, one row each. This is the source of truth. Add a row the moment a code is assigned.
• UPC, physical: the CD plant supplies one free per title with the print order. These live under the plant's GS1 prefix, which is fine for merch table and funnel sales. Our own GS1 prefix is only worth buying if physical sales ever need to report cleanly to us.
• UPC, digital: DistroKid supplies one free per release.

Both the ISRC and the UPC are encoded into the disc itself when the mastering engineer builds the DDP image. They cannot be added afterward. Adding one later means paying to rebuild the masters. So the codes have to exist before masters are built, which means before the print order, which means early.

• Check the master list. Does this recording already have an ISRC? If yes, that code is final. Use it. Do not issue a new one.
• If no, assign the next code from our prefix and add the row to the master list before doing anything else with it.
• Get the UPC. Physical: ask the plant to assign it ahead of the order rather than at order time. Digital: DistroKid issues it at upload.
• Send the mastering engineer the full checklist — artist, album title, genre, exact track listing, one ISRC per track, one UPC per disc — and confirm spelling before he builds. What you send is what gets burned in.
• Reserve UPC space on the tray card at real UPC-A spec before artwork goes to print.
• On DistroKid upload, choose "I already have an ISRC" per track and paste ours in. Never accept the auto-assigned code for a recording that is already pressed or already released.
• Register with SoundExchange using the same ISRC and UPC.
• Add the recording to the BMI work registration with the same ISRC.

• Last five digits follow album position, so the catalog reads itself: Disc One is 00001 through 00013, Disc Two is 00014 through 00026.
• 00004 and 00009 are permanently unused. Those slots belong to Fireproof and Shapeshifter, which already carry DistroKid codes from their single releases. Skipping a number is allowed. Reassigning one is not.
• Legacy codes that stay as they are: Fireproof QT6EV2669023, Shapeshifter QT6J32633180.
• That leaves 24 new codes under our own prefix.