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 0xd50d304356ffef3a63e3f9b0b62446870c55444a7e764d53573f5533ad99913d. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a846a27c-861d-42ef-b631-bb0976d6fe8c.json and https://artists.proofprofile.net/proofs/artist/a846a27c-861d-42ef-b631-bb0976d6fe8c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lyric Pieces Book Iv, Opus 47 No. 2 - Album Leaf
Children's Corner, L. 113: I. Doctor Gradus ad Parnassum
Children's Corner, L.113: II. Jimbo's Lullaby
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df7dd5b9bae67f322da1311a74b903b64408c01af605251beb05b69e055eac7. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJV2372175.
Frédéric Chopin: Fantasie-Impromptu C-Sharp Minor, Op. 66
Isaac Albéniz: España, Op. 165: V. Capricho Catalan
The Seasons, Op.37a: 11. November: Troika
Piano Sonata in C major, Opus 1: 3rd movement
Piano Sonata in C Major, Opus 1: 2nd Movement
Piano Sonata in C major, Opus 1: 4th movement
The Seasons, Op.37a: 10. October: Autumn Song
The Seasons, Op.37a: 12. December: Christmas
Piano Sonata No. 2 Bb Minor, Opus 35 2. Movement
Piano Sonata No. 2, Bb Minor, Opus 35: 4. Movement
Piano Sonata C Major, Opus 1-1st Movement
Piano sonata No. 2 Bb minor, Opus 35: 1. Movement
Études d'exécution transcendante No. 4 - Mazeppa
Études d'exécution transcendante No. 5 - Feux Follets
Études d'exécution transcendante No. 8 - Wild Hunt
Hungarian Rhapsody No. 9 Carnival in Pest
Hungarian Rhapsodies No. 15 - Rákóczy March
Lyric Pieces Book Iii, No. 4, Opus 43: Little Bird
Lyric Pieces Book III, No. 6, Opus 43: To Spring
Lyric Pieces Book I, Opus 12 No. 3 - Watchman's Song
Lyric Pieces Book I, Opus 12 No. 4 - Fairy Dance
Lyric Pieces Book V, Opus 54 No. 2 - Norwegian March
Lyric Pieces Book Iii, Opus 43 No. 1 - Butterfly
Piano Sonata in G Major, Hoboken Xvi 8 1. Movement
Lyric Pieces Book V, Opus 54 No. 3 - March of the Dwarfs
Lyric Pieces Book Iii, Opus 43 No. 2 - Solitary Traveller
Piano Sonata in C Major, Hoboken Xvi:7 2. Movement
Lyric Pieces Book Vii , Opus 62 No. 4 - Brooklet
Songs Without Words Book 1, Opus 19 No. 1
Songs Without Words Book 1, Opus 19 No. 2
Songs Without Words Book 1, Opus 19 No. 3
Songs Without Words Book 1, Opus 19 No. 4
Songs Without Words Book 1, Opus 19 No. 5
Songs Without Words Book 1, Opus 19: No. 6 Venetian Gondola Song
Songs Without Words Book 2, Opus 30 No. 1
Songs Without Words Book 2, Opus 30 No. 2
Songs Without Words Book 2, Opus 30 No. 3
Songs Without Words Book 2, Opus 30 No. 4
Songs Without Words Book 2, Opus 30 No. 5
Songs Without Words Book 4 Opus 53 No. 5 - Folk Song
Songs Without Words Book 5 Opus 62 No. 3 - Funeral March
Songs Without Words Book 5 Opus 62 No. 4 - Morning Song
Songs Without Words Book 5 Opus 62 No. 5 - Venetian Gondola Song
Pictures at an Exhibition Ballet of the Unhatched Chickens
Pictures at an Exhibition Samuel Goldenberg and Schmuyle
Piano Sonata in D Major, D 850, Opus 53: 1. Movement
Pictures at an Exhibition the Market Place of Limoges - Catacombae - Con Mortuis in Lingua Mortua
Piano Sonata in D Major, D 850, Opus 53: 2. Movement
Pictures at an Exhibition the Hut on Chicken's Legs - The Great Gate of Kiev
Piano Sonata in D Major, Opus 53: D 850, 3. Movement
Piano Sonata in D Major D 850 Opus 53: 4. Movement
Fantasia C Major D 760, Opus 15: 1. Movement
Fantasia C Major D 760, Opus 15: 2. Movement
Fantasia C Major D 760, Opus 15: 3. Movement
Piano Sonata in a Minor, D 784, Opus 143: 1. Movement
Fantasia C Major D 760, Opus 15: 4. Movement
Piano Sonata in a Minor, D 784, Opus 143: 2. Movement
Piano Sonata in a Minor, D 784, Opus 143: 3. Movement
6 Moments Musicaux No. 3, Opus 94: D 780
6 Moments Musicaux No. 4, Opus 94: D 780
6 Moments Musicaux No. 5, Opus 94: D 780
6 Moments Musicaux No. 6, Opus 94: D 780
4 Impromptus D 935, Opus Posth 142: No. 2
4 Impromptus D 935, Opus Posth 142: No. 3
4 Impromptus D 935, Opus Posth 142: No. 4
Piano Sonata in Bb Major, D 960: 3. Movement
Piano Sonata in Bb Major, D 960: 4. Movement
Scenes from Childhood, Opus 15: a Tale of Distant Lands
Scenes from Childhood, Opus 15: Curious Story
Scenes from Childhood, Opus 15: Blindman's Buff
Scenes from Childhood, Opus 15: Pleading Child
Scenes from Childhood, Op. 15: 5. Perfect Happiness
Scenes from Childhood, Op. 15: No. 6, Great Adventure
Scenes from Childhood, Op. 15: VIII. At the Fireside
Scenes from Childhood No. 9, Op. 15: On the Rocking Horse
Scenes from Childhood, Opus 15: Almost Too Serious
Album for the Young No. 12, Op. 68: Knecht Ruprecht
Album For The Young, Op.68: X. The Happy Farmer
Sonata No. 11 A major Alla Turca, KV 331 1. Movement
Sonata No. 11 A major Alla Turca, KV 331 3. Movement