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 0xb8bba0e5df8291683801c96b254323ab6abbe7ad937d0c86dcff54b6496ee440. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/696f9f3c-e333-4079-9c9f-5d0bb8a11771.json and https://artists.proofprofile.net/proofs/artist/696f9f3c-e333-4079-9c9f-5d0bb8a11771.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Cello Compositions (Frescobaldi - Cassado, Valentini - Piatti, Boccherini - Schröder, Locatelli - Piatti)
Boccherini: 6 Cello Sonatas (arr. Piatti)
Capriccio sopra un tema della Niobe di Pacini (Caprice on a Theme from Pacini's Niobe), Op. 22
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 0x0dcc524c2585bf3279b1b5de632b4cc213950e100029849f271374040fa21bef. 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/HKI191030001 — a six-check JSON result.
12 Caprices, Op. 25: No. 1. Allegro quasi presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc6ee6ced76fbeee6f48968d531c08f2714dff905180f47ec7c98f5fdc1bfa0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKI191030002 — a six-check JSON result.
12 Caprices, Op. 25: No. 2. Andante religioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f289d2f16efef1a7f395feebf95078547d1fce346f82c3503804bdb1869433. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191030003 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5a414b837ce59d7484956e90192529c49d69d8800c6ae9110395a892d3ab8f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKI191030004 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc844f7dc3864f6f58594e12d67a6d5b10a76621924a3a2feb93810ed47a0f220. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/HKI191030005 — a six-check JSON result.
12 Caprices, Op. 25: No. 5. Allegro comodo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005fae5a5d111b2b2a2843f28502a7ba3c801cfebe34d638830b6e3c872fe8af. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/HKI191030006 — a six-check JSON result.
12 Caprices, Op. 25: No. 6. Adagio largamente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba72db58378d20a964fa3dd3cf8cc8f4ad1fdf86e529a5df5ae5cf240a80336. 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/HKI191030007 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc5b9b14650925cf5e8dfdd29abb73ceb4b40804be19dab7db2dea99c6b0516. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKI191030008 — a six-check JSON result.
12 Caprices, Op. 25: No. 8. Moderato ma energico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a322fa30c310ca0df5739a9ecb1dace02e6c0ba9de36ba614169199cffe596f. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191030009 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32cf879f9f03986388677aec66bb00e2b7ef1b70b288a5afb8294241d9435c46. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/HKI191030010 — a six-check JSON result.
12 Caprices, Op. 25: No. 10. Allegro deciso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225950f9aeb88911d6c481a914fe0f9d951f3643d3ef5de1f7d2330cecc15ab8. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/HKI191030011 — a six-check JSON result.
12 Caprices, Op. 25: No. 11. Adagio - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ef2c29f86f5b020443a177dc3e708eee6ec92b1f39a43b52eb4951c824a4a7. 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/HKI191030012 — a six-check JSON result.
12 Caprices, Op. 25: No. 12. Allegretto capriccioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fce728cd9e3e7fad32574e26c771272010dd1c55a16fbfb9ab8a147e2ad47e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191030013 — a six-check JSON result.
Piatti: Capricci, Op. 22 & Op. 25 per Violoncello solo - Dallapiccola: Ciaccona, Intermezzo & Adagio
Piatti: 12 Caprices - Khachaturian: Sonata-Fantasia
Piatti: 12 Caprices for Solo Cello, Op. 25
Capriccioso: Works for Solo Cello by Piatti • Duport • Popper
21 Études for Solo Cello: No. 7 In G Minor - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebc377be64713e4c00f9e748ece8e1ffba15cd824190610633e72175dcd0fe0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM4TW1558452 — a six-check JSON result.
12 Caprices, Op. 25: No. 1 in G Minor - Allegro quasi presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb3194231bf2c639e76866b3c9bf4d0bcf78f451664bc0bf951978627978033. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW1558453 — a six-check JSON result.
12 Caprices, Op. 25: No. 2 in E Flat Major - Andante religioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74977930f6e10567b3eb4bfb02fd77d5e54da4c5338566ced08245d97a47f423. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM4TW1558454 — a six-check JSON result.
12 Caprices, Op. 25: No. 3 in B Flat Major - Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067b50b3f6ca8996828585745e44f23c64c235d5ab5e3a13342667796302b734. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW1558455 — a six-check JSON result.
12 Caprices, Op. 25: No. 4 in D Minor - Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8d3b0edb0130804ffc5654d74df1c3787d803f623db0c7bb3d5de7e00bdac6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW1558456 — a six-check JSON result.
12 Caprices, Op. 25: No. 5 in F Major - Allegro comodo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f4a77d655543b9cf6f738ba71a47eff42ddcdfca4bcd8451a3cbb48e64a07a. 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/QM4TW1558457 — a six-check JSON result.
12 Caprices, Op. 25: No. 6 in A Flat Major - Adagio largamente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb4e581dcfa9ad740749c3d6098cb2d7e217debf4309518f7cb5f5e1022bd42. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW1558458 — a six-check JSON result.
12 Caprices, Op. 25: No. 7 in C Major - Maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d08a5ed00b496cea403bd80f1519a3b7dce70983493bf78c1d3870b2d6d48a0. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW1558459 — a six-check JSON result.
12 Caprices, Op. 25: No. 8 in A Minor - Moderato ma energico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf516d59caef5bcf9be79ce0020c1819cd23598a658d1696bc2e896cee6650909. 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/QM4TW1558460 — a six-check JSON result.
12 Caprices, Op. 25: No. 9 in D Major - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969fa018f9135a0cc9888652ced282f3450bd0730a382830d0fbc15fdc1fbb0f. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QM4TW1558461 — a six-check JSON result.
12 Caprices, Op. 25: No. 10 in B Minor - Allegro deciso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b40eb39fc6ad6bbac845248b050a7d963834fdf0ab1fd86f5b30059956dbb38. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QM4TW1558462 — a six-check JSON result.
12 Caprices, Op. 25: No. 11 in G Major - Adagio – Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60b2e487df22a5b5bf5a7de0abd373553858d85dc1f012b211c5ae478ea9458. 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/QM4TW1558463 — a six-check JSON result.
12 Caprices, Op. 25: No. 12 in E Minor - Allegretto capriccioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b7d7f16b74ef02eeee3458bebe21672ec85dd4ac2d5e18de730296b82938af. 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/QM4TW1558464 — a six-check JSON result.
Hohe Schule des Violoncello-Spiels, Op. 73: Étude No. 29 in F-Sharp Minor - Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca13b37884aa89b7531df8a185a16bbad4647f1be88caf6ac72f1a77db2a6dd. 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/QM4TW1558465 — a six-check JSON result.
Capriccio sopra un tema della Niobe di Pacini, Op.21
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f5150fd6f34eb4db2bad275c501ca4cb6daff99dfbb7c48c251567a0d0d3e9. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QM4TW1558466 — a six-check JSON result.
21 Études for Solo Cello: No. 8 in D Major - Adagio cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2b4025c615e11706de07b9bc2f8ae65327fc6939678d46da5833b888da0464. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM4TW1558467 — a six-check JSON result.
Alfredo Piatti: 12 Caprices, Op. 25 & Reminiscence of Verdi's Trovatore, Op. 20
Piatti: Music for Cello and Piano, 2 Songs
Alfredo Piatti: The Operatic Fantasies, Vol. 2
Alfredo Piatti: 12 Caprichos para Violonchelo Solo Op. 25