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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a267d12e34a3695e23fdd204acfabe185704ad02ff0280cbd646614840e1e2. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e01eff8-0445-4ad0-b8dd-454c43748868.json and https://artists.proofprofile.net/proofs/artist/6e01eff8-0445-4ad0-b8dd-454c43748868.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piano Quartet No. 1 in G Minor, K. 478: I. Allegro
Piano Quartet No. 1 in G Minor, K. 478: II. Andante
Piano Quartet No. 1 in G Minor, K. 478: III. Rondo
Piano Quartet No. 2 in E-Flat Major, K. 493: I. Allegro
Piano Quartet No. 2 in E-Flat Major, K. 493: II. Larghetto
Piano Quartet No. 2 in E-Flat Major, K. 493: III. Allegretto
Mozart: Piano Quartet No. 2 in E Flat Major, K. 493: III. Allegretto
Mozart: Piano Quartet No. 1 in G Minor, K. 478: III. Rondo
Fantasie in C Minor, K. 475: Fantasie in C Minor, K. 475
Adagio in C Major, K. 356: Adagio in C Major, K. 356
Fantasie in C Minor, K. 396: Fantasie in C Minor, K. 396
Menuett in D Major, K. 355: Menuett in D Major, K. 355
Fantasie in D Minor, K. 397: Fantasie in D Minor, K. 397
Rondo in D Major, K. 485: Rondo in D Major, K. 485
Piano Sonata No. 13 in B-Flat Major, K. 333: I. Allegro
Piano Sonata No. 13 in B-Flat Major, K. 333: II. Andante cantabile
Piano Sonata No. 13 in B-Flat Major, K. 333: III. Allegretto grazioso
Sonata, K. 333: III. Allegretto grazioso
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 → block OTSBitcoinBlock must exist at that height 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 0x3d0bc9300ccdb1ad0f3ab8d8911ec9ac184359786a78469fc16df38af521cddc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLWD2001001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845cbb54602e1505d1aa0819e0cedf0d9bf8182c53f05585ae05143ec563d682. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBLWD2001002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c232b64b24c4684b7ac2c3e13b97c2c028a9033eae79a4f710b7fc18761d91. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLWD2001004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a36755de47c8f2f92ab211642803be40f19d8ec7c8f84abe1f06c42f6a2b800. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBLWD2001008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57322bf946672573c1e84d40528f5297fc9a0dadc0fcbd07c5f2c2fc725beed. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBLWD2001014.
Bach: Italian Concerto, Partita No. 4 & Chaconne from Partita No. 2
Partita IV in D Major, BWV 828: I. Ouverture
Partita IV in D Major, BWV 828: II. Allemande
Partita IV in D Major, BWV 828: III. Courante
Partita IV in D Major, BWV 828: IV. Aria
Partita IV in D Major, BWV 828: V. Sarabande
Partita IV in D Major, BWV 828: VI. Menuet
Partita IV in D Major, BWV 828: VII. Gigue
Piano Sonata No. 23 in F Minor, Op. 57 - "Appassionata": I. Allegro assai
Piano Sonata No. 23 in F Minor, Op. 57 - "Appassionata": II. Andante con moto
Piano Sonata No. 23 in F Minor, Op. 57 - "Appassionata": III. Allegro ma non troppo - Presto
Pictures at an Exhibition: II. The Gnome
Pictures at an Exhibition: III. Promenade
Pictures at an Exhibition: IV. The Old Castle
Pictures at an Exhibition: VI. The Tuileries
Pictures at an Exhibition: VII. The Ox Cart
Pictures at an Exhibition: VIII. Promenade
Pictures at an Exhibition: IX. Ballet of the Unhatched Chicks
Pictures at an Exhibition: X. Samuel Goldenberg & Schmuyle
Pictures at an Exhibition: XI. Promenade
Pictures at an Exhibition: XII. The Marketplace at Limoges
Pictures at an Exhibition: XIII. The Catacombs (Sepulchrum romanum)
Pictures at an Exhibition: XIV. Con mortuis un lingua mortua
Pictures at an Exhibition: XV. The Hut on Fowl's Legs (Baba Yaga)
Pictures at an Exhibition: XVI. The Great Gate of Kiev
Mozart: Sonata, K. 333: III. Allegretto grazioso