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 0x963bc17c9c27b6a47acb71a501b6da0437d212b696d08c9e15bb54ff59c788ff. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9edbe826-48df-4e5e-8545-0f1ee7d1f077.json and https://artists.proofprofile.net/proofs/artist/9edbe826-48df-4e5e-8545-0f1ee7d1f077.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Canonic Sonata for Two Violas in D Minor, TWV 40:121: Canonic Sonata for Two Violas in D Minor, TWV 40:121: I. Vivace ma moderato
Georg Philipp Telemann: Viola Concertos - Overtures - Fantasias
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 0x52401affbd2ac1ddfef7dfeea9c1d79ebb8b9b93a11430241ca5aec663729c06. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR7JM2020120.
Canonic Sonata for Two Violas in D Minor, TWV 40:121: Canonic Sonata for Two Violas in D Minor, TWV 40:121: II. Piacevole non largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da32b191eb4d93058153316e569fb90eb387e083789df74813a407ee253e4d9. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR7JM2020130.
Canonic Sonata for Two Violas in D Minor, TWV 40:121: Canonic Sonata for Two Violas in D Minor, TWV 40:121: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb735b83b44a0d572f295e58452883094f17396007ce9ed5ecdd0e5a1940a60e0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR7JM2020140.
Concerto for Two Violas in G Major, TWV 52:G3: Concerto for Two Violas in G Major, TWV 52:G3: I. Avec douceur
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b867bca33715bf5f1e2088ec714be398233c494519495660a26d7932ba1b7e4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR7JM2020300.
Concerto for Two Violas in G Major, TWV 52:G3: Concerto for Two Violas in G Major, TWV 52:G3: II. Gaÿ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e6df428ea2ece5ef53b2548a5ce4c25a286d114f46c6aee75070d245881063. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR7JM2020310.
The Art of Fugue, BWV 1080 (Roger Vuataz Orchestration): Contrapunctus 1 "Einfache Fuge über das Thema in seiner Urgestalt, a 4"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad7f3ebee29d51e79ed2126437859cd14910234bc5280378cbb5c1c0ebedd45. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FRZ140926020.
The Art of Fugue, BWV 1080 (Roger Vuataz Orchestration): Contrapunctus 8 "Tripelfuge über zwei neue Themen und das variierte Hauptthema, a 3"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860b40be1ba016f1da78765ae19501b9ad8a79e2c352dcd91e14852dc04b320f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRZ140926110.
Concerto for Two Violas in G Major, TWV 52:G3: Concerto for Two Violas in G Major, TWV 52:G3: III. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4c4b42212b55e8db5c03fa5d3051fc244e1eb95c0659127825c9028abb851a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:02:19Z), 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/FR7JM2020320.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Concerto for Two Violas in G Major, TWV 52:G3: Concerto for Two Violas in G Major, TWV 52:G3: IV. Vivement
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1859d9b0e34bc2791cf61bea3a5c654cec29b7da7065210e736bfda918797a. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/FR7JM2020330.
The Art of Fugue, BWV 1080 (Roger Vuataz Orchestration): Contrapunctus 7 "Gegenfuge über das variierte Thema und seine Umkehrung in drei verschiedenen Wertgrößen, a 4"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3908dece56f78beed622c94a2ca311b53d2ad4b0df103e9c294af362dc36040. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FRZ140926090.
The Art of Fugue, BWV 1080 (Roger Vuataz Orchestration): Kanon 16. "Kanon in der Dezime - Contrapunto alla terza"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc4545ad23c58f386dc866e805ee1dcb1621f54f7d0680eb2259471232fda37. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FRZ140926100.
The Art of Fugue, BWV 1080 (Roger Vuataz Orchestration): Contrapunctus 10 "Doppelfuge über eine neues Thema und über das variierte Hauptthema, a 4"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe508c3ab151727e8d5409f515492d905757e7612e88e9fd87144fc717c617863. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FRZ140926130.
The Art of Fugue, BWV 1080 (Roger Vuataz Orchestration): Contrapunctus 13b. "Spiegelfuge über das variierte Thema und seine Umkehrung, a 3"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba1f8ce091da95171ec735b118b92f070a19f9e237512ea5e54080dbdd7f8ca. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FRZ140926190.