Evgeni Alexandrovich Koroliov (; born 1 October 1949, in Moscow) is a Russian classical pianist. Koroliov studied at the Moscow Conservatory. Since 1978 he has been a teacher at the Hochschule für Mu
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 0xad2321bfe56a73ed8b6ea24fee9da8a260a25de7602d79fd5d630c17e21f13a4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c21f5e16-1874-4f61-a5e3-1b77018fc316.json and https://artists.proofprofile.net/proofs/artist/c21f5e16-1874-4f61-a5e3-1b77018fc316.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Concerto No. 1 in D Minor, BWV 1052: 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 0x533776a0c1cc779380f7a1c0e4b369d97bb2583e879f03d6ccdaa8e8ea4641ab. 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/FR50X1844601.
Concerto No. 4 in A Major, BWV 1055: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2682c9e1bb9f6228faa489dfbff8bdc7d0fac86853db83df5cd1cb0934d7b29. 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/FR50X1844616.
Concerto No. 4 in A Major, BWV 1055: III. Allegro ma non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85896e371e1cb4e256719a70fc610496e80bed175226d39469ea9d8cbb5c8194. 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/FR50X1844618.
Concerto for Two Keyboards in C Minor, BWV 1060: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dddfdd33fea6524668061d28a3f8f62ac1f37af9698fbdc86893edd74a1658e. 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/FR50X1844604.
Concerto No. 7 in G Minor, BWV 1058: I. [...]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ba32accb55b6e2b3004793b50475f1dc66ef13c5e2c4b7b6e4560cbf55a5b9. 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/FR50X1844607.
Concerto for Two Keyboards in C Major, BWV 1061: I. [...]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62dba969732da972f873e142d38baad85334145dcd107e15dc0418498ce7175c. 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/FR50X1844622.
Concerto No. 7 in G Minor, BWV 1058: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be9762e8a58319a49b917cbf229cc72d6be3fa41e2964c2682528c53ac789b3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1844609.
Concerto for Two Keyboards in C Major, BWV 1061: III. Fuga. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16044aa7c197a5f15cb70f35324b243c7449eb5d2b4e83e6830b96c676fb8c0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR50X1844624.
Concerto for Three Keyboards in D Minor, BWV 1063: I. [...]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967771a324521f4d6f7c4c98cd965a70d6a39107a46163e678d968401f3f3626. 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/FR50X1844625.
Concerto for Two Keyboards in C Minor, BWV 1062: II. Andante e plano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3faddea72d7ba60fb3bae2b042de675f5132efbe5bd25de1c6831195fa4d2b. 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/FR50X1844611.
Concerto for Three Keyboards in D Minor, BWV 1063: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03c047f1730b3c419969cbec44e0dd03c0a67efceb957f344876cf1a74c0567. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1844627.
Concerto for Three Keyboards in C Major, BWV 1064: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094645b5e235a1d6dd40452834ba602aa3d3471109d25b2d329a4f0f24162b29. 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/FR50X1844613.
Concerto for Four Keyboards in A Minor BWV 1065 (Arranged for Three Pianos): III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6c622210ac1ffdb0a33ee9878dfec17aa26408a98d771c2d7c992738a6c993. 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/FR50X1844630.
Concerto No. 1 in D Minor, BWV 1052: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb46dc4cc55d146213a1163c5dd0850fe1a398751f93e542d79f1d9dcbb88ec. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1844602.
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
Concerto No. 1 in D Minor, BWV 1052: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4613620efdac8e76f34131b7419dfa6126686a453e54a7004aca11d93dabb8. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1844603.
Concerto for Two Keyboards in C Minor, BWV 1060: II. Largo ovvero adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdfc6c34bcb086b71a827465c1121f4d6661b7a2bdc6509b34288640511abb5. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FR50X1844605.
Concerto for Two Keyboards in C Minor, BWV 1060: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7260cb6ffcbd35a76251c2d5657b0416143f8ec8f026c23e4b72787f3c1dbf6e. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/FR50X1844606.
Concerto No. 7 in G Minor, BWV 1058: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010b595341ab0859df6d2f25e911554171ece6a3755aabd5f864c071e6b7b115. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1844608.
Concerto for Two Keyboards in C Major, BWV 1061: II. Largo ovvero adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d13f387b6ea711eed36c645c8274aa03f2a9685e2019f8a9ac1d6bbc8f3c9f. 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/FR50X1844623.
Concerto for Three Keyboards in D Minor, BWV 1063: II. Alla sicilliana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e61c159eccb63c05ceeb1aaf651af473e8a65175ec0d48c1ddbdf66f75579a7. 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/FR50X1844626.
Concerto for Four Keyboards in A Minor BWV 1065 (Arranged for Three Pianos): I. [...]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1b52b9bef22b4ef1e58b86f8011ed0094006406c291a3e21a953718213dfaf. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FR50X1844628.
Concerto for Three Keyboards in C Major, BWV 1064: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5738112e807406a7923dd8c6ee4f2de74a2d41b0cba0828c7d3bf30081d0b2. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1844614.
Concerto for Four Keyboards in A Minor BWV 1065 (Arranged for Three Pianos): II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671b1f5c114f181edf59299283907b80a54b112716cae29f579e8c6a6c61b56f. 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/FR50X1844629.
Concerto for Three Keyboards in C Major, BWV 1064: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06e670a994eb34438522c53f8fb9caa2acfd2a9acf812408c76e72b07f91005. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1844615.
Piano Concerto No. 21 in C Major, K. 467 "Elvira Madigan": II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10af01334a77e5ec7c5ba560eaef111dbba78b6a61dcb85281c1657ad6390803. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/SEWDL0731005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10af01334a77e5ec7c5ba560eaef111dbba78b6a61dcb85281c1657ad6390803. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL0731005.