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 0x30df679050855cb944a74be95363cb5027d6bfd803290ba8878ff30cf9716479. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db0dcc2a-5e9a-4f42-9898-65ef0aa96f0d.json and https://artists.proofprofile.net/proofs/artist/db0dcc2a-5e9a-4f42-9898-65ef0aa96f0d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Concerto for Cello and Strings No. 2 in D Major, G. 479: 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 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 0x959af12d4e3e0bf12c677a5a54c5fb55cf659faf33cf889f2f936c52d7e4328f. 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/NLY330606109.
Cello Concerto No. 6 in D Major, G. 479: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddb493a4fb1c86d9d038094dfe990ad9bc6eeabf0fd62c4b7f9616d27e76948. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/US2Y30758899.
Cello Concerto No. 12 in E-Flat Major, G. Deest: I. Allegro moderato - Maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3359e5f0d5b5a5f05fd0d32cfb5a1bcbefcafeb296d50e6d1104f59c21d5f04a. 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/US2Y30758911.
Cello Concerto No. 12 in E-Flat Major, G. Deest: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecf360ba485ddacf6913f48c55df1f7c9bbe7386907cf37634922f696b299b7. 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/US2Y30758912.
Cello Concerto No. 6 in D Major, G. 479: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf804c01320e9a4d378311a3c709b7f5b9ae8812955a15b971630bf9843b5415b. 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/US2Y30758901.
Cello Concerto No. 7 in G Major, G. 480: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc5cb17bed670f7fea544fef91e1bab6af80635fdfdc0927d1dca60a02212ca. 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/US2Y30758902.
Cello Concerto No. 5 in D Major, G. 478: I. Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f5b84c4f33d3faefb58188398f2e8c391becd9fde721128aa505c93490296e. 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/US2Y30758914.
Cello Concerto No. 7 in G Major, G. 480: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a3b8edbccd21347eccdf9293b69f28807de12d8c6cc3e24fd72de0963b49ce. 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/US2Y30758903.
Cello Concerto No. 5 in D Major, G. 478: III. Rondo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9db85cb34e15091456e35114dc0122b4e8de125137cebb0a7259c98aa55c9f. 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/US2Y30758916.
Cello Concerto No. 4 in C Major, G. 477: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2616e766a80eaec21c68e2f7a8766ee92bfa65bce8d6a87cf4cadc72da03d431. 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/US2Y30758905.
Cello Concerto No. 4 in C Major, G. 477: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e4b84ffefdba7302fe119676952e0ab330c7f05699aed76155d898176c8f36. 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/US2Y30758906.
Cello Concerto No. 4 in C Major, G. 477: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68aaf80c220f327ec2d9ca3d1838f8cc3d5731644f996761ee700acf3b2ed9d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2Y30758907.
Cello Concerto No. 9 in B-Flat Major, G. 482: I. Allegro Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8d0e05e722fe70a21452c75432f43d78b3cab13b049ff3f64a54f7476d5b54. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/US2Y30758908.
Cello Concerto No. 9 in B-Flat Major, G. 482: III. Rondo - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf9f501b6b0f1e2d6724f48b21765a1d5a0cc2ddf3b90ea6af2412506db2edb. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2Y30758910.
Concerto for Cello and Strings No. 2 in D Major, G. 479: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf48c6eb83c83b7be467adc476d5daa3732e84dfed7af2ac1afe4e2bcb1b829d. 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/NLY330606110.
Concerto for Cello and Strings No. 2 in D Major, G. 479: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b7a2597cb22dc2edaa9b03ed9f38c4869193ea6854dd35814d987240d5a7aa. 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/NLY330606111.
Concerto for Cello and Strings No. 3 in G Major, G. 480: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534eba538a1fc78fabbd383d47ee663c49378a00257fa60ff555a1b755780324. 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/NLY330606112.
Concerto for Cello and Strings No. 3 in G Major, G. 480: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ec94ff2b19566e1ed4b063822d3f45552e75ce959f18ef047d3e721cefd74c. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/NLY330606113.
Concerto for Cello and Strings No. 3 in G Major, G. 480: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fa88a765c11b60c47ec7a6ac4dc20786ebda0e933ad075fdee9e91770bd4e9. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/NLY330606114.
Concerto for Cello, 2 Horns and Strings No. 1 in C Major, G. 477: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e82d9406312051ec3099775145e471ae954dadc1a6840ca8a868781f69c9546. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NLY330606115.
Concerto for Cello, 2 Horns and Strings No. 1 in C Major, G. 477: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94555526f28dd87fd5c9a7507fa41ea66b7325645e31b95ab75eb7f66aa48315. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/NLY330606116.
Concerto for Cello, 2 Horns and Strings No. 1 in C Major, G. 477: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b3ffdafdbb140a76b1c595a128a47d5ce77906b3d870fbd5b5f435ef44b9e3. 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/NLY330606117.
Concerto for Cello, 2 Horns and Strings No. 9 in B-Flat Major, G. 482: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719a7619461fe3a42b5b09656ba4af430d19cb1554634b9f5f06bbd62b6576aa. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY330606118.
Concerto for Cello, 2 Horns and Strings No. 9 in B-Flat Major, G. 482: II. Andantino grazioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03419b21e2ef73c10d6669fea2353fe7f15e99b0d88b6410ee7fd1ad81d86362. 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/NLY330606119.
Concerto for Cello, 2 Horns and Strings No. 9 in B-Flat Major, G. 482: III. Rondò Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28139d839b63561a13b23b2cf3e3f6a84a4204998fd8d01264c9ababa94d329. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/NLY330606120.
Concerto for Cello, 2 Oboes, 2 Horns and Strings No. 12 in E-Flat Major, G. deest: I. Maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbf8e8f0b6ad959e29b55090fe7e33a8f3c965b971eae8f671e16829893c64d. 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/NLY330606121.
Concerto for Cello, 2 Oboes, 2 Horns and Strings No. 12 in E-Flat Major, G. deest: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba539e712986da25bc9a0c4df1eddfb9618652cdd5a8d1616263cb35816596d. 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/NLY330606122.
Concerto for Cello, 2 Oboes, 2 Horns and Strings No. 12 in E-Flat Major, G. deest: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0b71a1889928483c0337d71098d817cf3ec7c230a8daf9e709e3288ffd0529. 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/NLY330606123.
Concerto for Cello, 2 Oboes, 2 Horns and Strings No. 8 in D Major, G. 478: I. Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9689e32229b5093b067fbd68ea8dd8e7b636a3602814fb7f4cd6609969cae5f4. 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/NLY330606124.
Concerto for Cello, 2 Oboes, 2 Horns and Strings No. 8 in D Major, G. 478: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bf96c13018e60af64af31e96a530ca71826ed07bd22a5f7a551b33bf1b1552. 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/NLY330606125.
Concerto for Cello, 2 Oboes, 2 Horns and Strings No. 8 in D Major, G. 478: III. Rondò - Rondò - Comodo assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a568c4c9d46d8334f384a4c3b1bacf4cfd03a4653c2490eab0d5f1000e0b53d. 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/NLY330606126.