Lazar Naumovich Berman (, Lazar Naumovich Berman; February 26, 1930February 6, 2005) was a Soviet Russian classical pianist, Honoured Artist of the RSFSR (1988). He was hailed for a huge, thunderous t
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 0xf5f1a008d1e534f5956ac14232b86361c6858dd5f8c93fb7159ccc17f94dfab1. 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/73a19e3f-f91c-48af-80dc-0002f51433d0.json and https://artists.proofprofile.net/proofs/artist/73a19e3f-f91c-48af-80dc-0002f51433d0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
24 Préludes, Op. 28: No. 15 in D-Flat Major: Sostenuto
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 0xbbf36e8d4220fbbff1d09bc9d560bf49e3941c1a3418a8324c2c6835a720201e. 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/DEF057530515.
12 Etudes, Op. 10: No. 3 in E Major "Tristesse"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6583293a71d4c8535175ca837ae87364ae3bcee2b820bb5440a7f8e973215c14. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056530103.
12 Etudes, Op. 10: No. 12. in C minor "Revolutionary"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a99a96fc478b13622bb3d4d7203a075d68874cdfa97ed48973c1101b83178b0. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/PLA028502040.
Nocturne No. 2 In E-Flat Major, Op. 9 No. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdf6f58fc79c0a91d6c565efde7f4b9e72ed73697f8500a9c50e796febf07be. 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/DEF056500511.
Polonaise No. 6 in A-Flat Major, Op. 53 "Heroic": Maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914f2074b73d1eb4b3e9d1d7640c94cfe231274ef308a355f72aafa6543f3baf. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEF057900720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36337fd925439baee5ba31c0ca5002735b3a5d0ccbdb0b1074a596d86518ebd3. 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/DEF056502040.
Impromptu No. 4 In C Sharp Minor, Op. 66 "Fantaisie-Impromptu": Allegro agitato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193abd12c446db5d5023d92a5a4aa36dbb39d9d9e21004e184d30952b20f4abd. 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/DEF059403410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3efdbec4b9150d1d0c13a719ff7a05438ed87d3dcc89d4bb423f52b0db205ca. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DEF057530504.
12 Etudes, Op. 25: No. 1 in A-Flat Major "Harp Study"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ef548ea13ec069b64da3387add915c15b1760d09237f5b79850917cf13f0cc. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DEF056530201.
Mazurka No. 5 in B-Flat Major, Op. 7 No. 1: Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f56014d807dbd86e8ec674eb24fa06c6acebaeac4a2fb70ebe2c073c04d72fa. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DEF056500650.
Waltz No. 9 In A-Flat Major, Op. 69 No. 1 "Farewell"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfada5631c3a5b2338f5e44482e20a3c2225742052be7c09ccb9f34b110ca02. 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/DEF059002581.
Berman Plays Haydn, Handel, Liszt and More
Années de pèlerinage I, S. 160: III. Pastorale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adc340d0c2d24e3f19d4cd8fb022b18e3669be67d9b028ac9bf0988f18988fa. 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/DEF057702763.
Piano Concerto No. 1 in B-Flat Minor, Op. 23: I. Allegro non troppo e molto maestoso – Allegro con spirito
Tchaïkovsky: Concerto pour piano n° 1 - Concerto pour violon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffcf41d31513118e1c5d71d72348788d583a7228925f7e89fb8c2efe788516a. 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/DEF057503201.
Piano Concerto No. 1 in B-Flat Minor, Op. 23: II. Andantino semplice – Prestissimo – Tempo I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ffd835faadcf724855b1dddee275c98c375d7a02a02fc2bf5d53fcb2e41d9b. 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/DEF057503202.
Piano Concerto No. 1 in B-Flat Minor, Op. 23: III. Allegro con fuoco – Molto meno mosso – Allegro vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fe95c93b70fd56c272ec7240330b9df7f800efebaeb75c7a857cafd3df66dd. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/DEF057503203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914f2074b73d1eb4b3e9d1d7640c94cfe231274ef308a355f72aafa6543f3baf. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEF057900720.