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 0x5f04ef70dec5640dfdbf1fd8781b6bce5f2731e7ff39c534bd570b5028ecc192. Chain 2 (Bitcoin): anchored in block 954027 (2026-06-17T00:55:08Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3993ec43-8ce8-4024-b1ca-9635a6e3016d.json and https://artists.proofprofile.net/proofs/artist/3993ec43-8ce8-4024-b1ca-9635a6e3016d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Divertimento in D Major, K. 136 "Salzburg Symphony No. 1": I. Allegro - Live Recording
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 0x61a15483cafee51d1d77cd5287b6d8eabf1466649add2164255149889476f03b. 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/ITD541900010.
Capriccio for 3 Oboes (cadenza by a. Baccini): I. Adagio [arr. A. Baccini]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adaa6241f6d9e7366dfc1a4a2074b72ae9e8c6df48fe2397d0d5ed5bcc74389. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU241106281.
Capriccio for 3 Oboes (cadenza by a. Baccini): III. Primo tempo [arr. A. Baccini]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f398d7797a1a5930d849aac83f76edfe7726984e077952100f50de0d556f340. 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/DEU241106283.
Beethoven: Quintetto in E-flat Major, op. 16; I Solisti della Scala
Albinoni: Complete Oboe & 2 Oboes Concerts
Concerto for 2 Oboes in C Major, Op. 7 No. 2: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b75278014089cd494baa8a1a640c88bc2811a3e56909f25d637e718076df08. 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/ITDQ70550641.
Oboe Concerto in D Minor, Op. 9 No. 2: I. Allegro e non presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9017e7d1889dec208557c7fb36c445da44a33d288636033cb0e1f3e03fa9fc. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITDQ70550651.
Concerto for 2 Oboes in C Major, Op. 7 No. 2: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ea33833903da0173f5ff5d8010e3f926ec4d02b1404530ed8cbaa48f6e01c2. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/ITDQ70550642.
Oboe Concerto in D Minor, Op. 9 No. 2: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a7074066fc65e6172d264c6985f9c3bd64fed5d31c1944e8eeba4a8efb8019. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ITDQ70550652.
Oboe Concerto in D Minor, Op. 9 No. 2: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00a5ea450e01b65d0f4835b697bb1af55622b22efcacf7d465676e0d2d6e6a4. 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/ITDQ70550653.
Oboe Concerto in B-Flat Major, Op. 7 No. 3: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1dba7c3a1e9b462aa05c795cf8011254de0c1a0921d5cb873fda609e47c322. 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/ITDQ70550644.
Concerto for 2 Oboes in F Major, Op. 9 No. 3: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde726ce35f4bd60116c5180a2f50738bfa40da3deb27009533d3625bd9a9b96b. 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/ITDQ70550654.
Oboe Concerto in B-Flat Major, Op. 7 No. 3: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391ab695d2c1cfcc9a2db346ab2595d5a45728a9c0c9f86dc31354256cd154f4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ITDQ70550645.
Concerto for 2 Oboes in F Major, Op. 9 No. 3: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efead13525e4529807b0716d0fd6b1f8ce66d7d336ceb19acde6f3c240890d1. 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/ITDQ70550655.
Oboe Concerto in B-Flat Major, Op. 7 No. 3: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456838e6178bc84ed690058a21030a2f503fc21cd07fc40a897c88e4fb364e72. 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/ITDQ70550646.
Concerto for 2 Oboes in F Major, Op. 9 No. 3: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8119ac472787d16e75da45821ad1b726d2e5d05dd566c81275b0df5de87ce103. 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/ITDQ70550656.
Concerto for 2 Oboes in C Major, Op. 7 No. 5: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976779aaca6b68d373f55bad5d6b6bd634171579a5d82ec6f85f4761fc7acb0d. 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/ITDQ70550647.
Oboe Concerto in D Major, Op. 7 No. 6: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940faa83bfbb71b10faeb5d042513bf781dff8982f72470c7aeee9c26ed824f0. 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/ITDQ70550640.
Oboe Concerto in D Major, Op. 7 No. 6: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28473a1aeb22af5ed77c24ff7b77f1e34f651a83144d7bf3f6f62be060fe0037. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITDQ70515064.
Concerto for 2 Oboes in D Major, Op. 7 No. 8: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cc71b6c53e80139aacd4f30256ee56efbe697754f5b04088cadad25d832192. 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/ITDQ70535064.
Oboe Concerto in G Minor, Op. 9 No. 8: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a5a304ff5b4eafd6757b8cb6f48830e7544e34c6d90258697daa0ee21829a9. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ITDQ70545065.
Concerto for 2 Oboes in D Major, Op. 7 No. 8: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b664f567fabde876378481ad04acf9e3db344f4997259fcc9bcdb42ce1107a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ITDQ70555064.
Concerto for 2 Oboes in C Major, Op. 7 No. 11: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f68217a6191bf4ab1822de43efa466891f8066aef95f446f0314789290dad8. 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/ITDQ70595064.
Concerto for 2 Oboes in D Major, Op. 9 No. 12: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12157a71e4ddb680a9b2f1d533e963cddca681224fb29e1f893d932a1d090cda. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/ITDQ70556522.
Oboe Concerto No. 4 in G Major "Harmonia mundi": I. Adagio - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d72dd055a63c5e7eb00e06b2bd210868fe8257eed96252591615ef6845fdbb. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ITDQ70556425.
Oboe Concerto No. 4 in G Major "Harmonia mundi": III. —
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dda6e78433f0e11bce336074196b4f9da889ab5e5ab442dcef5684005120922. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ITDQ70556427.
Castelnuovo-Tedesco: Guitar Chamber Works - Complete Edition
Quintet for Guitar and String Quartet, Op. 143: I. Allegro, vivo e schietto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72931cbb0b3156e239d5556a2e30847edd0f6a30968db62566cbde9d044c54ae. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITUM72101060.
Quintet for Guitar and String Quartet, Op. 143: II. Andante mesto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e2e4381f0e198c0a611ced896e77e73b9dcf2a7e0f466ccb91f5487422b7d3. 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/ITUM72101061.
Sonatina, Op. 205: I. Allegretto grazioso
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Sonatina, Op. 205: II. Tempo di Siciliana. Andantino grazioso e malinconico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e638b98503eed36b6d9c2cfd117f55c2d6db89ff91797b6bb6bb1f88e2ed5df. 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/ITUM72101091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf174c55e854ca14f46678ca0db9c673d5df9813e09dc6ee5e433d15df2974010. 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/ITUM72101095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39f60ab80f15e3fd40dd2b7762eb5178f01ac4a9ac52e2e9a1d7676c8545909. 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/ITUM72101096.
Mozart: Sinfonia concertante in E-flat major, K. 297b
Sinfonia concertante in E-Flat Major, K. 297b: I. Allegro
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Sinfonia concertante in E-Flat Major, K. 297b: II. Adagio
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Sinfonia concertante in E-Flat Major, K. 297b: III. Andantino con variazioni
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020ee32dd51e15e3c82e314e4db8af441862d59e3044f54bc5e7d1e6f2b99f65. 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/NLY331407985.
Concert at Opera House in Riga (Live Recording)