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 0x9317f3923a326fdcf6ef2004e52f57df25cb5eb751cb0112247f6ceca9dc4ba8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63a7c375-aa36-4840-a43a-dbcfbdfe594b.json and https://artists.proofprofile.net/proofs/artist/63a7c375-aa36-4840-a43a-dbcfbdfe594b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Shostakovich / Schnittke: Cello Sonatas / Stravinsky: Suite Italienne
Lutoslawski: Cello Concerto / Penderecki: Cello Concerto No. 2
Chopin: Cello Sonata in G Minor / Schumann: Phantasiestucke, Op. 73
Suite No. 1 in G Major for Solo Cello, BWV 1007: I. Prelude
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 0xcb692c6a70f8616fecef92c2dbbf7ed40f279db5b0720a08fda91a9af82568e1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SEAEI9603010.
Suite, Op. 23: IV. Lied. Schlicht und innig, nicht zu langsam
Korngold: Suite, Op. 23 & Piano Quintet, Op. 15
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262d290215035ebc98282609076a6d3e3876973a11817c1542e79c0a9cc7ea89. 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/HKI192015604.
Suite No. 5 in C Minor for Solo Cello, BWV 1011: IV. Sarabande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aabb8bdb56dfaa3bc97911b6210f5f30e99cb9f84e6a6a2028e6a03c8f078db. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEAEI9604100.
Trio in A Minor for Clarinet, Cello and Piano, Op. 114: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425791e397272600c840f72c3566d575e99d4541738faafa80c28b19fe1bafa7. 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/SEAEN0553100.
Cello Concerto in E Minor, Op. 85: I. Adagio - Moderato
The 99 Most Essential Classics of the Romantic Era
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd94923f4a30a11b9ce0b35f651b81c1e47f08efb419cbc6eb01425a9da2a371. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SEAEE9186040.
Piano Quintet in E Major, Op. 15: III. Finale. Gemessen beinahe pathetisch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853d2cd6a29b513764d8fee9228efc101e16230000602b4fbfdf0463f5536672. 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/HKI192015608.
Piano Quintet in E Major, Op. 15: I. Mäßiges Zeitmaß, mit schwungvoll blühendem Ausdruck
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28340c93ea23836efd2f1d15aab3d2169abb817bf6331dd6393f4491c9d230af. 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/HKI192015606.
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
Piano Quintet in E Major, Op. 15: II. Adagio. Mit größter Ruhe, stets äußerst gebunden und ausdrucksvoll
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4eba9df53a2c848c6cb8c8ed799a913f12aa0998e9d20b61b17ac3a14ee561. 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/HKI192015607.
Suite, Op. 23: III. Groteske. Möglichst rasch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157a735ff0193160191e5681072eee777e7f4e277305513261ba9b5f2edc9602. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/HKI192015603.
Suite, Op. 23: I. Präludium und Fuge. Kräftig und bestimmt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa335ff6758f562698b1c8ee06a7f9ed850779a4278aba69d77b399bd3ba3442a. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/HKI192015601.
Suite, Op. 23: II. Walzer. Nicht schnell, anmutig
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99605b8899d7aee7862571803f23d5eb791fef37af47c6dbaa6ce9deb4c1d56. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HKI192015602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fbdb184b795fadf3a1bb0be15eb8ed785fb531dd4bf8138475da2e3f61d8b3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HKI192015605.