1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3940da265a165b930e41ed0574c4b5532712f3d209a8aa18bffa6fe9264f35. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7a49991-23bf-4eaf-bbc7-ca0e745bec59.json and https://artists.proofprofile.net/proofs/artist/e7a49991-23bf-4eaf-bbc7-ca0e745bec59.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Polonaise no. 6 in A flat major op.53 \Heroic\""
Etude no.12 in C minor op.10 no.12 \Revolutionary\""
Etude no.23 in A minor op.25 no.11 \Winter Wind\""
Nocturne no.5 in F sharp major op.15 no.2
Mazurka no.17 in B flat minor op.24 no.4
Mazurka no.41 in C sharp minor op.63 no.3
Polonaise in C Sharp Minor, Op. 26, No. 1
Polonaise No. 6 in A Flat Major, Op. 53 "Heroic"
Etude No. 12 in C Minor Op. 10, No. 12 "Revolutionary"
Etude No. 23 in A Minor, Op. 25: No. 11 "Winter Wind"
Nocturne No. 5 in F Sharp Major Op. 15, No. 2
Mazurka No. 17 in B Flat Minor Op. 24, No. 4
Mazurka No. 41 in C Sharp Minor Op. 63, No. 3
Piano Concerto No. 2 in F Minor, Op. 21: II. Larghetto
Mazurka No. 1 in F sharp minor Op. 6 No. 1
12 Etudes, Op. 10: No. 12. in C minor "Revolutionary"
12 Etudes, Op. 10: No. 2. in A minor "chromatique"
12 Etudes, Op. 25: No. 11 in A minor "Winter Wind"
12 Etudes, Op. 10: No. 5. in G flat "Black Keys"
12 Etudes, Op. 10: No. 3. in E "Tristesse"
Waltz No. 9 in A flat, Op. 69 No. 1 -"Farewell"
Waltz No. 2 in A flat, Op. 34 No. 1 - "Valse brillante"