1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ee6e3e53d66f2245a1165dbefe215ce40d5963b0a183376c0c30ad91eb6262. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce288d28-6c29-4a83-a1b2-183597d20ee4.json and https://artists.proofprofile.net/proofs/artist/ce288d28-6c29-4a83-a1b2-183597d20ee4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dominant 7th Chords (One Chord Guitar Backing Tracks in Neo Soul R&B Style 80bpm)
Major Chords (One Chord Guitar Backing Tracks in Neo Soul R&B Style 80bpm)
Minor Chords (One Chord Guitar Backing Tracks in Neo Soul R&B Style 80bpm)
Major Jazz Blues Guitar Backing tracks in 12 key (90bpm)
12 Major keys of 100bpm Swing Jazz Guitar Backing Tracks
12 Bar Blues (100bpm In All 12 Keys) Guitar Backing Tracks
12 bar Blues Guitar Soloing Backing Tracks (120bpm in Classic Blues Rock style)
Slow Blues (12 bar Blues) Guitar Soloing Backing Tracks in 65bpm
Guitar Backing Track (I IV V IV, 110bpm Latin Bossa Fusion Style)
Major Chords (100bpm Swing jazz style) One Chord Guitar Backing Tracks
ii V I (65bpm Soul Jazz) backing track for Guitar improvisation
Minor Blues in all 12 keys (70pm Swing) Guitar backing tracks for improvisation
8 Bar Blues in 12 keys (120 bpm Swing) backing tracks
Minor Blues in all 12 keys (140pm Swing) Guitar backing tracks for improvisation
12 bar blues (110bpm Swing) Guitar Soloing Backing Tracks
bVImaj7 V7 im7 (75 bpm Neo Soul R&B Style)
ii V I (100bpm Jazz) backing track for improvisation
I vi IV V (85bpm) Ballad Medium Rock style Backing Tracks in all 12 Major Keys
Major Keys Slow Ballad Soul Backing Tracks (50bpm 12-8time)
i bVII VI bVII in minor keys (150bpm Metal Style)backing tracks
bVImaj7 V7 i7 (100 bpm Neo Soul R&B Style)
vi IV I V (165bpm Punk, Rap Rock Style) backing tracks
I V vi IV (160bpm Nu Metal, Punk Rock Style) Guitar Backing track
I V vi IV (85 bpm Neo Soul R&B Style) Guitar Backing track
Slow Blues Backing Tracks (60bpm Swing 12-8 time in Ballad Style)
Imaj7 IVmaj7 in Neo Soul Style(70bpm Swing) Guitar Backing Tracks
I V vi IV (120bpm Synth Pop) Backing Tracks
120 bpm Classic Blues Rock Style One Chord Vamping Guitar Backing Tracks
i v iv v (120 bpm in Texas Rock Style) Guitar Backing Tracks
190 bpm Gypsy Jazz One Chord Vamping Backing Tracks (Minor)
190 bpm Gypsy Jazz One Chord Vamping Backing Tracks (Major)
190 bpm Gypsy Jazz One Chord Vamping Backing Tracks (Dominant)
12 bar blues (140bpm blues rock) backing tracks (all 12 keys)
Soul Bossa Nova Backing Tracks for soloing (140bpm)
12 bar blues in Bawdy Blues Style 85bpm (all 12 keys)
12 bar blues in Americana Folk Style 60bpm backing tracks (all 12 keys)
ii V I (120bpm) Swing Jazz backing track for improvisation
12 bar blues (120bpm Swing) Drum and Bass backing tracks
One Chord Vamping (Major7th Chords) 110 bpm Jazz Swing Style Guitar Backing Tracks
One Chord Vamping (Minor7th Chords) 110 bpm Jazz Swing Style Guitar Backing Tracks
One Chord Vamping (Dominant 7th Chords) 110 bpm Jazz Swing Style Guitar Backing Tracks
ii V I IV (110bpm) Swing Jazz Guitar backing tracks
Harmonized ii V I Chord Progression Backing Tracks (95bpm Soul Style)
85bpm Metal Style One Power Chord Vamping Guitar Backing Tracks
140 bpm Heavy Metal Style One Power Chord Vamping Guitar Backing Tracks
ii V I vi (100 bpm Jazz Funk Fusion Style) Guitar backing tracks
ii V I IV(140 bpm Heavy Metal Style) Guitar Backing Tracks
Minor Blues in all 12 keys (100bpm Rock Style)
IV V iii I (100bpm Hard Rock Style) Backing Tracks
IVmaj7 V7 iii7 vi (Royal Road Progression 120bpm J-Rock Style Backing Tracks)
Jazz Blues in all 12 keys (120bpm Swing) Guitar Backing tracks
Jazz Blues (100bpm Swing) Guitar Backing tracks in all 12 keys
100 bpm One Power Chord Vamping Gutiar Backing Tracks
iii IV (140bpm Jazz Rock) Guitar Backing Tracks
I III7 vi7 V7 (75bpm Swing) Ballad Style Backing Tracks
12 bar blues (80pm Slow Jazz Style) Guitar Soloing Backing Tracks
One Chord Vamping (Major7 Chords) 90 bpm Swing Blues Rock Guitar Backing Tracks
One Chord Vamping (Minor7 Chords) 90 bpm Swing Blues Rock Guitar Backing Tracks
One Chord Vamping (Dominant7 Chords) 90 bpm Swing Blues Rock Guitar Backing Tracks
Slow Minor Blues (12-8 time 60bpm) Guitar Backing Tracks
IV iv#dim V v#dim (120bpm Heavy Metal Backing Tracks)
Latin Bolero Rhythm Backing Tracks (ii7 V9 iii7 VI9 ii7 V7 Imaj7 (100bpm)
Hardrock Progressions I7 VI7 ii7 V7 (120bpm) Guitar Backing Tracks
R&B Jam Sessions: I-iii-vi-IV in All 12 Keys
110bpm Hard Rock One Power Chord Vamping Backing Tracks
IVmaj7 V7 iii7 vi (Royal Road Progression (100bpm) Metal Style Backing Tracks)
130bpm One Power Chord Vamping in Metal style Backing Tracks