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 0x9be4ddab0f82fcbf6f8b295517073344c7292aeaae53387b815ac37aef2ffba5. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91a267f0-45ac-474b-8798-669f9f7dd905.json and https://artists.proofprofile.net/proofs/artist/91a267f0-45ac-474b-8798-669f9f7dd905.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Martin Owen Plays Strauss, Schumann & Weber
Schumann: Concertstück for Four Horns and Orchestra, Op. 86: III. Sehr lebhaft
Strauss: Concerto for Horn and Orchestra No. 1, Op. 11, TrV 117: III. Allegro – Rondo
Weber: Concertino for Horn and Orchestra, Op. 45, J. 188: IV. Polacca
Strauss: Horn Concerto No. 1, Duett-Concertino & Serenade in E flat major
Horn Concerto No. 1 in E-Flat Major, Op. 11: I. 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10dcf94794ae35a90c6c186b10ac196efabf83860243cfcb7ca7a06255d39ad4. 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/GBASH1950601.
Duett-Concertino, TrV293: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8deea8428156c0eb05a5cb922e94feb5491d4b6bc9e2542f181e4b7423f170f3. 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/GBASH1950604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07f5e7dbc366e7849953f9081dc605fe0d3d476506289f6204281f2a318f91d. 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/GBASH1756719.
Quartet in G Minor, FWV N:g2: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edbebfa5668243c9b51c4d845aea4113d165a0c468ea1b326cd6600927b525f. 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/GBASH1446710.
Quartet in G Minor, FWV N:g2: III. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f79e6c7a37f7a0ffa22154987c41e475149e3fcdb3c81557bdb32471cd6b85. 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/GBASH1446711.
Quartet in G Minor, FWV N:g2: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44951c786593736f18edec1fc59b2bca4d50f8caf3c6c5fc5b35115c80a0f8e1. 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/GBASH1446712.
Horn Quartet in F Major, FWV N:F3: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9450f0b38fb65e0dd0ef0968ae4f1b8b63f977cecf8ffaeb1528af0147d0b43b. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/GBASH1446706.
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
Horn Concerto in E-Flat Major: I. Con discretione
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24dc917637739cf57b23726fc8bfcbaa6ef4fe8871bde52e8b2369cca0bec957. 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/SEAEY1715010.
Horn Concerto in E-Flat Major: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603b9eecf2a5c5a03b3a5e23123f6a7bebce040c9741ed1bce8d53d4ebbcabb6. 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/SEAEY1715030.
Horn Concerto in E-Flat Major: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef509f7769bb20861053b8905a4b86b5eeae5057b85f8bae0bbd3bad3f15da4e. 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/SEAEY1715070.
Horn Concerto in E-Flat Major: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9facfaf348a79f5bf1a2e04884a38651ae66b7e55c29159bab07f56d97d30ade. 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/SEAEY1715080.
Horn Concerto in E-Flat Major: III. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd521aa33a8f67f926a3d293fd5821df0b62c4cd8ade30fe83c468a41f9e1841b. 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/SEAEY1715090.
Sinfonia da camera in D Major, LMW VII:D5: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d98ecf4e99d7225bfee6b149bd0f3f1a54c3ae36f546fe8146dad909cf4acd6. 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/SEAEY1715100.
Sinfonia da camera in D Major, LMW VII:D5: II. Menuet - Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fbc15fe1636cf05a63a3e0dc60b3329ea429f9d16c2de085b6b27122baedf9. 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/SEAEY1715110.
Horn Concerto No. 1 in D Major, Hob. VIId:3: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c166ebc9e1316d56c8993a5d68c1cbef6488595bd0da244aa15ca353103926. 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/SEAEY1715140.
Horn Concerto No. 1 in D Major, Hob. VIId:3: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec78e02f839997cc0fd201007cbd16e4d9e0ba69a90a2a2543caef7bc0f26d9c. 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/SEAEY1715150.
Horn Concerto in E-Flat Major: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff50e32d19fb4bbbbc07769778bea5d95adb0c6450623b7d7d891b4ccab22856. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/SEAEY1715020.
Horn Concerto in D Major, TWV 51:D8: I. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78782ac261bfccbe0f0612cf9153f85e62ff8683b5e4091760fc1818f3797aae. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/SEAEY1715040.
Horn Concerto in D Major, TWV 51:D8: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3ebeb44751bf6d7c679fb55914783612d42ee261d03ad31a1c7055b7516538. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SEAEY1715050.
Horn Concerto in D Major, TWV 51:D8: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78323f2e2d6112eafd94c5aa4f45dec9e4fe911c182b66cd14f2600b505a763. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SEAEY1715060.
Sinfonia da camera in D Major, LMW VII:D5: III. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d80051dd567edec3afde93df8a09c3252da117348f4fe312537af27bd82c94. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/SEAEY1715120.
Sinfonia da camera in D Major, LMW VII:D5: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd47db9f42e4657c235d7ba997475e596243d058429d5c694a2816465136ad8c. 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/SEAEY1715130.
Horn Concerto No. 1 in D Major, Hob. VIId:3: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3648db77876b54cefb8590c2fe30dd94ac5e702b813e4176a378d0171d5de04f. 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/SEAEY1715160.