thumb|right|250px|portrait of Bernhard Romberg (1815) Bernhard Heinrich Romberg (November 13, 1767 – August 13, 1841) was a German cellist and composer. Life Romberg was born in Dinklage. His fathe
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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca5872f6871463d162b05f797553f952a4a8a58a185aee7e01d753b01376e6c. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7c65c5c-34c8-4153-9a17-08aa80dc85d4.json and https://artists.proofprofile.net/proofs/artist/e7c65c5c-34c8-4153-9a17-08aa80dc85d4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Play It - Study-Cd for Cello: Bernhard Romberg, Sonate II, Op. 43,2, C Major / C-Dur
Romberg, B.H.: Symphonies Nos. 2 and 3 / Trauer-Symphonie
B. Romberg: Sonaten für Hammerklavier und Cello op. 5
Sonata in E flat major, Op. 5/1: I. Adagio Allegro
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8287118cd064ab8f48abf0fe2df20a04aca66a345de8328405eccad664359578. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEE471300283.
Sonata in B flat major, Op. 5/3: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34a2fc645e593202ef852d786242adc4357e147ea9c158269b32e6f20826cf0. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEE471300291.
Sonata in B flat major, Op. 5/3: III. Rondo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3603723f505ae1126ec6980ddaf7152f1f8fcd946c40af0f970f0fd5f0ba4c3. 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/DEE471300293.
Concertino for 2 Cellos in A Major, Op. 72/III. Rondo. Con allegrezza
Concertino for 2 Cellos in A Major, Op. 72: III. Rondo. Con allegrezza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6b9aeac26b1eb9ef97d57676c08e1ab28de03735c104e3fb58658b32c003b4. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DEE861903036.
Romberg: Harp Sonatas Nos. 1-3, Op. 5 (Version for Harp & Cello)
Trio No. 1 in E Minor: I. Allegro non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bd7082ccdcd5098eb8f2b2138d7388a25ce12f2e95fc26dd7c9fbe4a797ce7. 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/CHE272100788.
Trio No. 1 in E Minor: II. Andante grazioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1107ccf73707fc733194bf14f437e093ab4d11424fea905ab3d5b406bdc5e37a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CHE272100789.
Cello Concerto No. 4 in E Minor, Op. 7: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fda9af701fb34bd37917b76cf8ccaf7245b293f25e6ae43a42133004a287b0. 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/DEB202035601.
Romberg: Good Bye, Great Artist. Truly Yours, Beethoven | 3 Grand Sonatas, Op. 5 for Harp and Cello
Romberg: Cello Concerto No. 2 in A Major, Op. 3: II. Adagio (Arr. for Arpeggione and Guitar by Vincenz Schuster)