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 0x8584c4a6750389c426b35a402d1dd6d9be41c8c34cdd5fea7d0955634881beab. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb57b706-f75f-4e57-9c94-ce318e2f2fe8.json and https://artists.proofprofile.net/proofs/artist/eb57b706-f75f-4e57-9c94-ce318e2f2fe8.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Mozart: Flute Concertos (2020 Digital Remaster)
Jean-Pierre Rampal Plays Mozart & Telemann (1956,1958)
Concerto for Flute and Harp in C Major, K. 299: I. Allegro
Jean-Francois Paillard Chamber Orchestra
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 0x6d8602c5e9591fc40f2fdfc979f50efabb1d4cdcfedb44d4dcef475b9f1d3f40. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITX921000213 — a six-check JSON result.
Concerto for Flute and Harp in C Major, K. 299: II. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0439fda020d07fe5a4d76f274120f6958bdb8fc7f302731a59e8b5dc2d619c25. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITX921000214 — a six-check JSON result.
Telemann: 2 Flute Concertos & Ouverture-Suite in A Minor (Mono Version)
Telemann: 2 Concerti in D Major & Ouverture-Suite in C Major (Mono Version)
Mozart: Concertos pour violon Nos. 3 & 4 (Mono Version)
Bach: Concertos pour violons, BWV 1041 - 1043 (Mono Version)
Mozart: Sinfonia concertante, K. 364 (Mono Version)
Mozart: 2 Symphonies concertantes in E-Flat Major (Mono Version)
Maurice André Edition - Volume 1 (2009 REMASTERED)
Haydn: Trumpet Concerto in E-Flat Major, Hob. VIIe:1: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5e01d7985fbc710859ef8fa5b1be41c74f2b64d17dcd4df379a1426e0f076d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ200900001 — a six-check JSON result.
Haydn: Trumpet Concerto in E-Flat Major, Hob. VIIe:1: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2640d01e41765725d0dd4f93ed5fc8a23ec0d51a5402a6d5cac8a02daf961f78. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ200900002 — a six-check JSON result.
Haydn: Trumpet Concerto in E-Flat Major, Hob. VIIe:1: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f7c8be744b311c91503ad5ea25476950ffafe415cc7f88c0e48bb55bad0538. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ200900003 — a six-check JSON result.
Mozart, L: Trumpet Concerto in D Major: I. Adagio
Orchestre de chambre Jean-François Paillard
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67da3ca3bd975e7b64fb7fc13d446a54dd52cb6489af973a96bd1451ce174c7b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ200900004 — a six-check JSON result.
Mozart, L: Trumpet Concerto in D Major: II. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e775aa401bcf36ea7aed154b0847c31e21fac39aef9a16fdb0d822f924674f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ200900005 — a six-check JSON result.
Haydn: Trumpet Concerto in C Major, Hob. VIIg:C1: I. Allegro spiritoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9238281b7f437b675d11501273a55a633e10a35e3ab720d29783aa06664692. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ200900006 — a six-check JSON result.
Haydn: Trumpet Concerto in C Major, Hob. VIIg:C1: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e0a5d22407fa517eeac16348107c94eefbe044cbe224550923352cfe61c7c3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ200900007 — a six-check JSON result.
Haydn: Trumpet Concerto in C Major, Hob. VIIg:C1: III. Rondo. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43dcb96b4c35c5abfa5fd6e176e373a4d15f6e2746a56fd0865b460f61a60e3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ200900008 — a six-check JSON result.
Mozart: Trumpet Concerto in C Major, K. 314: I. Allegro aperto (Transcr. of Oboe Concerto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9f7b0d6713a4341e5e746d13a2780274d96c96ee06974eecfe0b4fb3b5db94. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ200900009 — a six-check JSON result.
Mozart: Trumpet Concerto in C Major, K. 314: II. Adagio non troppo (Transcr. of Oboe Concerto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bdff5441469520b151c19934a5c408c123d9c50fa275685dc3d148da9cf233. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ200900010 — a six-check JSON result.
Mozart: Trumpet Concerto in C Major, K. 314: III. Rondo. Allegretto (Transcr. of Oboe Concerto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e36c06807388d3159daf6d8a9dd0b9ec2040405939d5cb65ad72c9ea43cbeb5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ200900011 — a six-check JSON result.
Vivaldi / Arr. Thilde: Trumpet Concerto in A-Flat Major: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329dac6e93cd2e177869e58ea1548d9f83ef18c0c916db59afe632575f72eb48. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ200900015 — a six-check JSON result.
Vivaldi / Arr. Thilde: Trumpet Concerto in A-Flat Major: II. Sarabande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ff1127f7db68b641837033be4389124f668641611d4a26fe6c70e0f8838ac9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ200900016 — a six-check JSON result.
Vivaldi / Arr. Thilde: Trumpet Concerto in A-Flat Major: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd131aaa39b6401f23ebf7fce30867d84aacf7068f9be53dc64f55f2c5be18bc7. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ200900017 — a six-check JSON result.
Albinoni : Trumpet Concerto in B flat : I Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b37f5ddd0587c4f5b412a8b57ea7c07ace7ac3a3f48a2c4943c659e02b7b7f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ200900018 — a six-check JSON result.
Albinoni : Trumpet Concerto in B flat : II Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967eec7a35ae716fc0c76d0acb675607c784496820d7b59c7171c1768bf552bd. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ200900019 — a six-check JSON result.
Albinoni : Trumpet Concerto in B flat : III Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70946ad390499c7b9759184bde0802b68f387a195ff7f464a0c31bc307455854. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ200900020 — a six-check JSON result.
Vivaldi: Concerto for Two Trumpets in C Major, RV 537: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2800093e0bdad31566008e35c9fe1082363b3f2df432c8cd31068ef2c369f90d. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ200900021 — a six-check JSON result.
Vivaldi: Concerto for Two Trumpets in C Major, RV 537: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c139e07c07ae5ee57f1abc204d03b5e5ef8b462cac8f480252eaf49e34d1901. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ200900022 — a six-check JSON result.
Vivaldi: Concerto for Two Trumpets in C Major, RV 537: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401dc6b2477e318a4a1c7077c28d99ca41205cd94febfac0e710db411e8c41d1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ200900023 — a six-check JSON result.
Stölzel : Trumpet Concerto in D major : I Allegro
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Hummel : Introduction, Theme and Variations in F major Op.102
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Handel: Concertos pour orgue Nos. 9 - 12 (Mono Version)
Handel: Concertos pour orgue Nos. 5 - 8 (Mono Version)
Handel: Concertos pour orgue Nos. 1 - 4 (Mono Version)
Mozart: 2 Concertos & Andante pour flûte et orchestre (Mono Version)
Bach: Suites pour orchestre Nos. 1 - 4 (Mono Version)
Suite pour orchestre No. 3 in D Major, BWV 1068: II. Sarabande
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Bach: Cantates, BWV 79 & 32 (Mono Version)
Bach: Cantates, BWV 53, 55, 189 & 200 (Mono Version)
Leclair: Concertos pour violon (Mono Version)
J.C. Bach: 2 Harpsichord Concertos (Mono Version)
Mozart: Concerto pour piano No. 15, K. 450 (Mono Version)
Mozart: Concerto pour piano No. 13 (Mono Version)