You can find Part 2 here
Based on a previous post, I decided to make a list of every disc from each of the currently available King Crimson boxsets. I do not include the content from the original Court of the Crimson King boxset from 2009 as that is long out of print and King Crimson is going to be redoing that set in the future. Where possible, I will include links to DGM if the discs are available for sale digitally through their store, in case you aren't interested in the sets as a whole, but might still want portions of them. If the disc is exclusive to the boxset, then I will make a note of it. This list is in order of when in King Crimson's history the boxsets cover, not necessarily the release order the sets came out in. For the sake of condensing the list as well as ease of reading the list, I will leave off the Discs that do not include studio releases as the main focus of this post is to show where on DGM Live you can purchase the content of the boxsets without having to purchase the entire boxset.

Sailors' Tales (1970-1972)

Sailor's Tales
Having lost half the band after In the Court of the Crimson King, Fripp would convince Greg Lake and Michael Giles to return as session musicians for In the Wake of Poseidon, but after that he would need a new overall lineup if King Crimson were to continue. This second Lineup would encompass In the Wake of Poseidon post-studio recording through Islands. This boxset covers the Islands era of King Crimson at the beginning of the 1970's. It was released on November 10, 2017.
CD Content-

1. In the Wake of Poseidon - Studio Album 2010 Stereo Mix
   1. Bonus tracks:
   2. Cat Food (Single A Side)
   3. Groon (Single B Side)
   4. Cadence and Cascade (Guide Vocal; Greg Lake)
   5. In the Wake of Poseidon (Take 3)
   6. The Devil's Triangle (Part I Early Running Mix)
   7. The Devil's Triangle (Part II Fripp/Tippett Overdubs)
   8. The Devil's Triangle (Part III Steven Wilson Mix)
   9. Peace - An End (Alternate Mix)
2. Lizard - Studio Album 2009 Stereo Mix
   1. Bonus Tracks:
   2. Indoor Games (Alternate Take)
   3. Happy Family (Alternate Take)
   4. Lady of the Dancing Water (Alternate Take)
   5. Prince Rupert Awakes (Jon Anderson, Vocals 2017 Mix by David Singleton)
   6. Prince Rupert Awakes (Keith Tippett, Piano)
   7. Bolero - The Peacock's Tale (Original Studio Recording, Bass Overdubs: Tony Levin)
   8. Prince Rupert's Lament (Alternate Take, 2015 Mix by Jakko Jakszyk)
3. Islands - Studio Album. 2010 Stereo Mix
   1. Bonus Tracks:
   2. Formentera Lady (Take 2, 2010 Mix by Steven Wilson)
   3. Sailor's Tale (Alternate Guitar Takes, Remix by Alex R. Mundy)
   4. Ladies of the Road (Rehearsal/Outtake, 2010 Mix by Steven Wilson)
   5. Prelude - Song of the Gulls (String Section, Take 2)
   6. Islands (Original Studio Recording, Vocal Overdub: Jakko Jakszyk)
4. The Zoom Club, Frankfurt April 12, 1971 - Available from DGM Live Here
5. The Zoom Club, Frankfurt April 13, 1971 - Available from DGM Live Here
6. The Zoom Club, Frankfurt April 14, 1971 - Available from DGM Live Here
7. The Zoom Club, Frankfurt April 15, 1971 - Available from DGM Live Here
8. The Marquee, London August 10, 1971 - Available from DGM Live Here
9. The Marquee, London August 10, 1971 - Part of same DGM Link as Disc 8
10. The Armory, Wilmington February 11, 1972 (Early Show) - Available from DGM Live Here
11. The Academy of Music, New York February 12, 1972 (Early Show) - Not on DGM Live
12. The Academy of Music, New York February 12, 1972 (Late Show) - Not on DGM Live
13. Cinderella Ballroom, Detroit February 18, 1972 - Available from DGM Live Here
14. Stanley Theatre, Pittsburgh March 6, 1972 - Available from DGM Live Here
15. Riverside Theatre, Milwaukee March 8, 1972 - Available from DGM Live Here
16. The Barn, Peoria March 10, 1972 - Available from DGM Live Here
17. Summit Studios, Denver March 12, 1972 - Available from DGM Live Here*
18. Originally released as King Crimson Collector's Club 9 in 2000 in a different mix in an edited form
19. Earthbound - Live album previously available. Available from DGM Live without bonus tracks

Blu-Ray Disc 1 Content-

1. In the Wake of Poseidon - Original Stereo Mix / 2010 Stereo Mix / 5.1 Surround Mix - 24/96
2. Additional Material - Stereo/5.1 Surround - 24/96
3. In the Wake of Poseidon - An Alternate Album Selection - Stereo - 24/96
   1. The alternate album selections take the tracklist of In the Wake of Poseidon and recreate it using Live versions or Alternate versions of recordings of the tracks.
4. Additional Material - Stereo - 24/96
5. Needledrops (Vinyl Transfers) - ILPS 9127 (In the Wake of Poseidon) - Stereo - 24/96
6. Needledrops (Vinyl Transfers) - WIP 6080 a/b (Cat Food EP) - Stereo - 24/96

Blu-Ray Disc 2 Content-

1. Lizard - Original Stereo Mix / 2009 Stereo Mix / 5.1 Surround Mix - 24/96
2. Lizard - An Alternate Album Selection - Stereo - 24/96
   1. The alternate album selections take the tracklist of Lizard and recreate it using Live versions or Alternate versions of recordings of the tracks
3. Additional Material - Stereo - 24/96
4. Needledrops (Vinyl Transfers) - ILPS 9141 (Lizard) - Stereo - 24/96
5. Rehearsals for 1971/72 Band Line-Up

Blu-Ray Disc 3 Content-

1. Islands - Original Stereo Mix / 2010 Stereo Mix / 5.1 Surround Mix - 24/96
2. Islands - An Alternate Album Selection - Stereo - 24/48
   1. The alternate album selections take the tracklist of Islands and recreate it using Live versions or Alternate versions of recordings of the tracks
3. Additional Material - Stereo - 24/48
4. Needledrops (Vinyl Transfers) - ILPS 9175 (Islands) - Stereo - 24/96
5. Guildhall, Plymouth May 11th, 1971 - Available from DGM Live Here
6. Green's Playhouse, Glasgow May 28, 1971 - Available from DGM Live Here
7. Eastown Theatre, Detroit November 13, 197 - Available from DGM Live Here

Blu-Ray Disc 4 Content-

1. Earthbound
   1. Extended tracklist. 12 tracks instead of 5
2. Schizoid Men Parts 1-11 - Not on DGM Live
   1. This is available as disc 2 of the King Crimson Club Special Edition album called Ladies of the Road: Live 1971-1972. It is not available as a digital purchase from DGM Live, however, you can purchase a CD copy currently from DGM USA or from DGM UK
3. Needledrop (Vinyl Transfer) - HELP 6 (Earthbound)
4. Unidentified 1972 Show No. 1 - Not on DGM Live
5. Unidentified 1972 Show No. 2 - Not on DGM Live
6. Chicago, February 17th - Available from DGM Live Here
7. Jacksonville, February 26th - Available from DGM Live Here
8. Orlando, February 27th - Available from DGM Live Here
9. Indianapolis, March 11th - Available from DGM Live Here
10. Denver, March 13th - Available from DGM Live Here
11. Denver, March 14th - Available from DGM Live Here

Larks' Tongues in Aspic: The Complete Recordings

Larks' Tongues in Aspic: The Complete Recordings
After the Islands Lineup Broke up, Robert Fripp would recruit Bill Bruford of Yes, John Wetton of Family, and David Cross to form the lineup that would run for the rest of King Crimson's 70's career. This Boxset picks up where Sailors' Tales left off, covering Late 1972 and 1973's Larks' Tongues in Aspic Studio Album. The boxset was released on October 15, 2012.
CD Content-

1. The Zoom Club, Frankfurt October 13, 1972 - Available on DGM Live Here
   1. On DGM Live, Discs 1 and 2 are swapped compared to the box set's listing. Based on the Tracklist, I'm assuming the Box set is correct.
2. The Zoom Club, Frankfurt October 13, 1972 - Second half of Disc 1's Content
3. Live in the Studio, Bremen October 17, 1972 - Available on DGM Live Here
4. Hull Technical College November 10, 1972 - Available on DGM Live Here
5. Hull Technical College November 10, 1972 - Second Half of Disc 4's Content
   1. The DGM Live Download does not include the John Wetton Interview that the Box Set disc includes here. The Interview is likely this one available on DGM Live.
6. Guildford Civic Hall November 13, 1972 - Available on DGM Live Here
7. Oxford New Theatre November 25, 1972 - Available on DGM Live Here
8. Glasgow Green's Playhouse December 1, 1972 - Available on DGM Live Here
9. Portsmouth Guildhall December 15, 1972 - Available on DGM Live Here
10. Larks' Tongues in Aspic Session Reels - Not on DGM Live
11. This Disc has one track that is 1:19:16 long, which is every first take the band made during the recording of Larks' Tongues in Aspic, with studio talk between the band members and the engineer between each song.
12. Larks' Tongues in Aspic - Original 1973 Stereo Mix 30th Anniversary Remaster
13. Bonus Tracks:
14. US Radio Ad
15. Easy Money (edit)
16. Exiles (edit)
17. Larks' Tongues in Aspic (Part II) - Not sure what is different on this. It is about 12 seconds shorter than the non-bonus Part II.
18. Alternate Takes & Mixes (Box Set has this listed as Disc 13. The DVD is Disc 12)
19. This is the tracklist for the Larks' Tongues in Aspic Studio Album made up of alternate takes or mixes of said tracks. The exception is that this disc has an extra Easy Money at the end.
20. Larks' Tongues in Aspic - 2012 Stereo Mix (Box Set has this listed as Disc 14. The DVD is Disc 12)

Starless

Starless. But not Bible Black?
This Boxset takes place between Late 1973 and Early 1974, sandwiched between Larks' Tongues in Aspic and The Road to Red. This Boxset was released on October 20, 2014.
CD Content-

1. Apollo Theatre, Glasgow, UK October 23, 1973 - Available on DGM Live Here
2. Apollo Theatre, Glasgow, UK October 23, 1973 - Second half of Disc 1's content
3. Volkshaus Zurich, Switzerland November 15, 1973 - Available on DGM Live Here
4. Volkshaus Zurich, Switzerland November 15, 1973 - Second half of Disc 3's content
5. Concertgebouw, Amsterdam, Netherlands November 23, 1973 - Not on DGM Live
   1. This and Disc 6 are not on DGM Live as a digital purchase, however they make up the Live Album The Night Watch, which can be purchased as a CD from DGM USA and DGM UK here.
6. Concertgebouw, Amsterdam, Netherlands November 23, 1973 - Second half of Disc 5's content
7. Palazzo Dello Sport, Udine, Italy March 19, 1974 - Available on DGM Live Here
8. Palazzo Dello Sport, Brescia, Italy March 20, 1974 - Available on DGM Live Here
9. ORTF T.V Paris, France March 22, 1974 - Not on DGM Live
10. Palais Paul Videl, Avignon March 24, 1974 - Available on DGM Live Here
11. Palais Des Sports, Besancon, France March 25, 1974 - Available on DGM Live Here
12. Stadttheater, Augsburg, Germany March 27, 1974 - Available on DGM Live Here
13. Halle Der Fachoschule, Diesburg, Germany March 28, 1974 - Available on DGM Live Here
14. Stadthalle, Heidelberg, Germany March 29, 1974 - Available on DGM Live Here
15. Elzer Hof, Mainz, Germany March 30, 1974 - Available on DGM Live Here
16. Jahnhalle, Pforzheim, Germany March 31, 1974 - Available on DGM Live Here
17. Stadthalle Kassel, Germany April 1, 1974 - Available on DGM Live Here
18. Stadthalle, Gottingen, Germany April 2, 1974 - Available on DGM Live Here
19. Concertgebouw, Amsterdam, Netherlands November23, 1973 - Not on DGM Live
20. This is an alternate 'preparatory' mix of The Night Watch made for radio broadcast by George Chkiantz in 1974
21. Starless and Bible Black - 2011 Stereo Mix
22. University of Texas, Arlington, TX October 6, 1973 - Available on DGM Live Here
23. Audio Curios - Not on DGM Live
24. Essentially, this disc seems to include live recordings that do not really fit anywhere else, including for example the complete Mincer improv minus the overdubs, the final tracks of University of Texas that didn't fit on Disc 21, Dr. Diamond from Atlanta, etc.
25. Palazzo Dello Sport, Udine, Italy March 19, 1974 - First half of Disc 7's Content

DVD Disc 2 Content

1. Stanley Theatre, Pittsburgh, USA April 29, 1974 - Not on DGM Live
   1. More accurately, this is only a small portion of the concert. The whole concert is available in The Road to Red Boxset. This portion is not available separately on DGM Live, but the whole concert is on DGM Live. I will include a link to the concert under the concert in The Road to Red.

The Road to Red

The Road to Red
Rounding out the end of the 1970's saga of King Crimson, as well as the Larks' Tongues era, John Wetton's and David Cross' tenure, and even the final tour before Robert Fripp discovers Dapper Dan in the 1980's, we have The Road to Red. This Boxset picks up days after Starless leaves off in 1974 and goes through the American tour King Crimson embarked prior to the release of Red. This boxset was released on October 14, 2013.
CD Content-

1. Veterans Memorial Colisseum, Columbus, OH April 28, 1974 - Available on DGM Live Here
2. Stanley Theatre, Pittsburgh, PA April 29, 1974 - Available on DGM Live Here
   1. This is the entire concert that a small portion is available on in the Starless Boxset.
3. Stanley Theatre, Pittsburgh, PA April 29, 1974 - Second half of Disc 2's Content
4. Hofheinz Pavilion, Houston, TX June 5, 1974 - Available on DGM Live Here
5. Tarrant County Convention Centre, Fort Worth, TX June 6, 1974 - Available on DGM Live Here
6. Fairground Arena, Oklahoma City, OK June 7, 1974 - Available on DGM Live Here
7. Civil Auditorium, El Paso, TX June 8, 1974 - Available on DGM Live Here
8. Coliseum, Denver, CO June 16, 1974 - Available on DGM Live Here
9. Performing Arts Centre, Milwaukee, WI June 22, 1974 - Available on DGM Live Here
10. Aquinas College, Grand Rapids, MI June 23, 1974 - Available on DGM Live Here
11. Massey Hall, Toronto, Ontario June 24, 1974 - Available on DGM Live Here
12. Massey Hall, Toronto, Ontario June 24, 1974 - Second Half of Disc 11's contents
13. Convention Center, Quebec City, Quebec June 25, 1974 - Available on DGM Live Here
14. Kennedy Centre, Washington, DC June 27 - Available on DGM Live Here
15. Casino Arena, Asbury Park, NJ June 28, 1974 - Not on DGM Live
16. This is an alternate mix with an additional track.
17. Casino Arena, Asbury Park, NJ June 28, 1974 - Available on DGM Live Here
18. Penn State University, University Park, PA June 29, 1974 - Available on DGM Live Here
19. Palace Theatre, Providence, RI June 30, 1974 - Available on DGM Live Here
20. Palace Theatre, Providence, RI June 30, 1974 - Second half of Disc 18's content
21. Central Park, New York, NY July 1, 1974 - Available on DGM Live Here
22. Red - 2013 Stereo Mix

DVD Content (Also on Blu-Ray Disc 2)

1. USA - 30th Anniversary Remaster - Available on DGM Live Here

On (and off) The Road

On (and off) The Road
After a nearly 7 year hiatus, King Crimson is back after Fripp brought back Bill Bruford and enlisted Americans Tony Levin and Adrian Belew into a very different iteration of King Crimson, one that wasn't even originally going to be called King Crimson. This box set covers this era, encompassing the 1980s and the associated studio albums of Discipline, Beat, and Three of a Perfect Pair. This Box set was released on October 28, 2016.
CD Content-

1. Discipline
2. Live in Japan December 18, 1981 - Available on DGM Live Here
3. Beat
4. Live at Alabamahalle September 29, 1982 - Available on DGM Live Here
5. Fragmented - Available on DGM Live Here
   1. This is a set of studio recordings made that would eventually be scrapped in favor of what would become Three of a Perfect Pair. This was previously available in the King Crimson Collector's Club, but this version has 2 additional tracks. The DGM Live purchase lacks the additional tracks as well. The additional tracks are:
      1. Yoli Yoli
      2. Adrian and Robert
6. Three of a Perfect Pair
7. Absent Lovers- Not on DGM Live
   1. This is not available as a Digital purchase from DGM Live, however you can purchase a CD copy of it from DGM USA or DGM UK.
8. Absent Lovers- Second half of Disc 7's content
9. Are you recording Gary? - Not on DGM Live
   1. This disc is similar to Larks' Tongues in Aspic's Session Reels in that it is a behind the scenes look at King Crimson in the studio. The title track is 15 minutes of King Crimson jamming and chatting working out material. The other three tracks are essentially abridged versions of the three albums of the era showing various portions of the albums in work in progress states.
10. Live at Moles Club - Available on DGM Live Here

DVD Bonus Disc 2 (Overall Disc 19) Content

1. Philadelphia July 30, 1982 - Available on DGM Live Here
2. Asbury Park July 31, 1982 - Available on DGM Live Here
3. Cap D'Agde August 26, 1982 - Available on DGM Live Here
4. Frejus August 27, 1982 - Available on DGM Live Here

You can find Part 2 Here