thumb|Arno Bornkamp en Córdoba - Argentina - 2010. Arno Bornkamp (Amsterdam, 1959) is a Dutch classical saxophonist, the professor of the Conservatory of Amsterdam, and is considered an influential so
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 0x0d9b97700226be10bef214e6a49cda6cc56ae6bc4cdb58675061f94b49977038. 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/ece65fd3-b246-4b4a-8414-ba7f582e737e.json and https://artists.proofprofile.net/proofs/artist/ece65fd3-b246-4b4a-8414-ba7f582e737e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tamberg: Joanna Tentata Suite - Symphonic Dances - Concerto grosso
Concerto grosso, Op. 5: I. Allegro moderato
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 0xf066eb2ea19471ec6c676d247326198ddedfe3266cdc26ba821687932318c2a4. 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/SEAEQ1077110.
Ballade for alto saxophone, piano, timpani and strings (1938)
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Opera Fantasy - Arr. For Saxophone and Orchestra
Württembergisches Kammerorchester Heilbronn
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Concerto in E-Flat Major, Op. 109 - Arr. For Saxophone and Orchestra
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Lakmé: Viens, Mallika,… dôme epais - Arr. for Saxophone and Orchestra
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Cello Suite No. 2 in D Minor, BWV 1008 (Arr. for Saxophone): I. Prélude
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Cello Suite No. 2 in D Minor, BWV 1008 (Arr. for Saxophone): II. Allemande
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Cello Suite No. 2 in D Minor, BWV 1008 (Arr. for Saxophone): IV. Sarabande
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Partita in A Minor for Solo Flute, BWV 1013 (Arr. for Saxophone): I. Allemande
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Partita in A Minor for Solo Flute, BWV 1013 (Arr. for Saxophone): II. Courante
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Partita in A Minor for Solo Flute, BWV 1013 (Arr. for Saxophone): III. Sarabande
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Partita No. 2 in D Minor for Solo Violin, BWV 1004 (Arr. for Saxophone): I. Allemande
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Partita No. 2 in D Minor for Solo Violin, BWV 1004 (Arr. for Saxophone): V. Chaconne
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Ravel: Transcriptions for Saxophone and Piano
Debussy: Transcriptions for Saxophone and Piano
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606a2a201d69a68fcdb3cb050d2831167dfbee71f4c8f3d39de8b2d6840d80e3. 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/USCXG0901075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bdaeef032aa32becc206ea97ef75aac94991daadf7c0fbb68d939835dd4168. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USCXG0901076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab898b1d67a4230b4648cfb8a424090ac80ac35237731c7427c9c0f0a0305b56. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/USCXG0901079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9fd4b0d21dee8c93a608b55ae9d690308905c97857ced009f8d4aeed42b894. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/NLB150900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecef64d382a073abed5674d235ce50a70672b00eee9e1c6d34653c1912c9c73a. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/NLB150900108.
Rhapsodie pour orchestre et saxophone alto, L. 98
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Hot-Sonate for Alto Saxophone and Piano: Hot Sonate 1
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Hot-Sonate for Alto Saxophone and Piano: Hot Sonate 2
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Hot-Sonate for Alto Saxophone and Piano: Hot Sonate 3
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Hot-Sonate for Alto Saxophone and Piano: Hot Sonate 4
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Saxophone Sonata, Op. 19: II. With Tranquility
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Saxophone Sonata, Op. 19: III. With Gaiety
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Sonata for Alto Saxophone: I. Ruhig bewegt
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Sonata for Alto Saxophone: III. Sehr langsam
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706531337bdfba4bb2de3649d4fa214c0f00e418b330eba674d20e240bf68800. 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/QMFMG1411256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d30097ddf688efd08f19796e031d825ba6c1703396c01f6d0fc3f8feaa5f091. 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/QMFMG1411257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661ef1aa1e778ef6da0421e13bc417c40c5ad3fe9f56d6b1585579f381a0a2d4. 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/NLQ662010169.
Strietman & Szymanowski & Toldrà: Orchestral Works & Orchestrations of Karol Szymanowski & Eduard Toldrà