Was going to enter the exact same question until I saw your post dating from a week ago. Since the Litany of the Most Precious Blood has a 1960 date of Papal authorization, was there a pre-existing Chant form?

Try contacting music directors and archivists of the various orders and houses still devoted to the Precious Blood. If you find something, by all means post it here.

Here is my own setting for the Litany.

Oh, thank you, I was rather apprehensive about posting my compositions here. I and my friend have composed a special "Litany against the persecutors of the Church" for our private recitation. I thought once of posting it here, but decided against the impulse. I hope this little contribution (Litany of the Precious Blood) may find its place somewhere in the Catholic world.

Deleted own comment.

For this July...

I want to make sure that proper credit is given to aldrich. My setting of the litany, posted above by Ben Yanke, includes the Versicle, Response, and Oremus sections taken from aldrich's .pdf above.

Additional hymns if you want.

Our women's schola and children's choir combined to sing a High Mass yesterday for the Feast of the Precious Blood. Thank you to all of those who answered my requests for the Litany of the Precious Blood, provided the accompaniment for "Salvete Christi Vulnera" ( Pedro d'Aquino), and posted the "Ira Justa Conditoris" chant (poster Ben Bruggink). Our choir was also able to incorporate the "Festivis Resonent" chant which Patricia Cecilia mentioned above. I agree that the translation is a catechism lesson in itself, as are the translations of "Salvete Christi Vulnera" and "Ira Justa Conditoris." You bloggers at Musica Sacra Forum really came through for us! The resources at Corpus Christi Watershed were invaluable, as well: Kevin Allen's "Ave Sacer Christi Sanguis" motet, and the NOH Proper accompaniments.

We sang in a sweltering choir loft, and it was a glorious Mass!

JonathanKK, back in 2011, I had contacted the Prior of the diocesan Benedictine order in Tulsa, OK, and was informed that the Litaniae Pretiosissimi Sanguinis was in the possession of a group of Benedictine nuns at the following address:

Abbaye Mont-de-la-Redemption
300 boulevard Paquette
Mont-Laurier, QC Canada J9L IL9

benedictines@tlb.sympatico.ca

Unfortunately, I had no luck in getting a response from them, having tried both standard mail and email (both in English, not French). Another forum member whom I gave this info to, was going to have an acquaintance make a visit, in-person, but I never heard whether this was successful or not.

So, in answer to your question, there is reason to believe that an "official" chant version does exist.

Folks, the quest continues. Has anyone got any new finds? My current best solution has been to use the last of the tones for the Litany of Loreto (Tonus alter as in the Liber Usualis).

I need help to identify the source of the attached version. It is in an undated/unmarked booklet entitled "The Healing Service and The Holy Hour - In the Eucharistic Presence of our Lord Jesus Christ".

As for the booklet, WorldCat has one in a library in Dayton, Ohio: https://www.worldcat.org/title/healing-service-and-the-holy-hour-in-the-eucharistic-presence-of-our-lord-jesus-christ/oclc/62232573&referer=brief_results

I also found the text of the healing service on a random website: http://www.therealpresence.org/eucharst/ben/heal.html

The other litanies in the booklet are as follows:
Litany of the Sacred Heart (mode 1 melody)
Litany of the Holy Name (mode 3 melody, as in Cantuale Romano Seraphicum 1951)
Litany of the Blessed Virgin Mary (first tone as in the Liber Usualis, with a clef typo)
Litany of St. Joseph (as in the Liber Usualis)

The tone itself seems stylistically uncharacteristic in some aspects: cadencing of the initial invocations on different pitches (and the Christe audi nos doesn't match anything else), and the use of the main body melody for the final Agnus Dei's.

So...

Who produced and used the booklet?

Where did they get this tone for the Litany of the Precious Blood, did they compose it?

That appears to be the same as the one composed by @aldrich above, but with improved typesetting.

The text of the Litany of the Precious Blood is in my Breviary, but I don't see a melody for it (which, since it's the Breviary, I wouldn't expect).

Tom,
Would the text be in the Breviary if were intended that it not be sung?

@tomjaw:

It is the last of the six litanies which are approved for public use.

See the Acta Apostolicae Sedis from 1960:
https://www.vatican.va/archive/aas/documents/AAS-52-1960-ocr.pdf#page=412

Given the date it was promulgated, there is only a small window of time in which chant for it could have been put out.

FWIW - scroll down a little -
https://cappellagregoriana.wordpress.com/2017/07/02/litany-of-the-precious-blood/

…is there an approved Litany for Corpus Christi, and in which book would I locate this?