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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c58777cd50e6b2670996afb4ea42f2d58601373f93ca2fd545444210a54763. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52084838-1011-4973-bc37-760e32744b00.json and https://artists.proofprofile.net/proofs/artist/52084838-1011-4973-bc37-760e32744b00.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dietrich, A.: Symphony, Op. 20 / Violin Concerto, Op. 30 / Introduction and Romance
Mendelssohn & Penderecki: Sextets (Live)
Bach, J.S.: Harpsichord Concertos, Vol. 2
Sinfonia in D Major, BWV 1045: 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df74cbad929e61c0edee02c34220844ad537773bf83246f2ce417f22d50bd01. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKI199910901.
Sinfonia in D Major, BWV 1045: II. Adagio e piano sempre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd94cdedaa1fd1d38ab6985d9e7e6a9b7e9c79decacfee031054980527e1c46. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199910902.
Sinfonia in D Major, BWV 1045: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbef6c26559bdc1a1c2edaf56b51fb4aa6a66d42003d5f92eddcfec6a62f8ff. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKI199910903.
Keyboard Concerto in G Minor, BWV 1058: I. [Allegro]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7bb41cecbd07e2d313836c94541d91a907ba4166620b1c630b48959bcf05d6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKI199910904.
Keyboard Concerto in G Minor, BWV 1058: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfcc8d686e3e6f0df9f5531c28faed2e27b7b0104643a8964369f5f631d3eee. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKI199910905.
Keyboard Concerto in G Minor, BWV 1058: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4b5800853558c1d439b9ee4c3a9544787a42937fc6ebdf9f2f88822452d51d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199910906.
Concerto for 3 Keyboards in C Major, BWV 1064: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5678c8db501096c0cf102c5ac1b2ae9dd28aa6f773187841f61478c973d3d9. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/HKI199910908.
Concerto for 3 Keyboards in C Major, BWV 1064: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8525733ca5ebd807667855b6886404dcd8cc7416bd0c88a036a1657fb4a11dbd. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199910909.
Concerto for 3 Keyboards in D Minor, BWV 1063: I. [Allegro]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe082101a63d412f23f2fbaeb7a9c445dfcb4a3d3805aca2e5b976729fde8410d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199910910.
Concerto for 3 Keyboards in D Minor, BWV 1063: II. Alla Siciliana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b883ca7145b3ad19d6af818137f98995bd7be66d64bc3590c645bd7c89b74f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKI199910911.
Concerto in C Major, BWV 1064 (arr. for 3 violins and orchestra): II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb92b277a7d9ad9d88c0fa65e95fb6beb2c20b17ddaf456a117d1cf19fc140ab. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199910914.
Concerto in C Major, BWV 1064 (arr. for 3 violins and orchestra): III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50aedb351cd79d2a25dd9ccd3ec763525fc67c81ed9c938ab1a61dd5419a736d. 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/HKI199910915.
Concerto in C Major, BWV 1064 (arr. for 3 violins and orchestra): I. [Allegro]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4376d2a75d9347aa96edbfd27b53dbf84359dba4ea2c13c63dff4eabe8c3f7e. 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/HKI199910913.
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
Bach, J.S.: Concertos for Harpsichords, Recorders and Violins
Nielsen: Wind Quartet, Op. 43 / Prokofiev: Quintet in G Minor, Op. 39 (Live)
Distinguished Performers, Series 3: Music for Piano and Strings