The UK's first official digital-download chart launches September 1, and figures from Apple's iTunes Music Store will form part of the matrix.
Spokesman James Gillespie of the Official UK Chart Company (OCC) confirmed the chart is currently being trialled with data taken from Apple's iTunes Music Store, OD2, Playlouder and Seven Digital Media.
OCC is also talking with Napster, Sony Connect and innovative UK digital-music company Wippit in order to find a way to include figures from these firms in the digital charts. "We want the audit to be as broad as possible", he stressed.
Announcing the chart British Phonographic Industry (BPI) chairman Peter Jamieson said: "People have talked about the online music revolution for years. The launch of the UK's Official Download Chart shows the revolution is here.
"There has been an incredible excitement over the past few weeks about the launch of new download services. With their choice and convenience these services are transforming people?s music buying experience.
"What really excites me about the launch of the Official Download Chart, however, is that it throws the emphasis away from the technology and on to what really counts - the music," he said.
As part of its trial period the chart is currently only available inside industry publication Music Week, but OCC is speaking with others in order to establish other outlets when the chart officially launches.
"Downloads are not a replacement for the physical single or album," said Jamieson. "What this test data shows is that they are generating a new way of listening to music. The excitement and energy surrounding the new legal music sites is giving a lift to the entire market."
OCC has released test data showing what the chart would have been for the week beginning June 21, 2004.
This chart - dubbed "the first digital top 20" returned the following results:
1 Pixies: Bam Thwok
2 Maroon 5: This Love
3 Outkast: Hey Ya!
4 Anastacia: Left Outside Alone
5 Mario Winans: I Don't Wanna Know
6 Corrs: Summer Sunshine
7 Rasmus: In The Shadows
8 Keane: Everybody's Changing
9 Jet: Are You Gonna Be My Girl
10 Beastie Boys: Ch-Check It Out
11 George Michael: Flawless
12 Streets: Dry Your Eyes
13 Britney Spears: Everytime
14 Avril Lavigne: Don't Tell Me
15 Streets: Fit But You Know It
16 Dido: White Flag
17 Cure: Lost
18 Snow Patrol: Run
19 Keane: Somewhere Only We Know
20 Ash: Teenage Kicks