thumb|Gilbert Kalish after performing at a concert in honor of the 90th birthday of George Crumb at Alice Tully Hall Gilbert Kalish (born July 2, 1935) is an American pianist. He is best known for cha
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 0x7afd693b4987577deec4aff9265f71e39c217b0be7ed8a050525ff1748b2f945. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c77240c-ad97-427a-be65-d4d12a8e7e93.json and https://artists.proofprofile.net/proofs/artist/8c77240c-ad97-427a-be65-d4d12a8e7e93.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Music of Amy Beach, Arthur Foote, Arthur Farwell and Preston Ware Orem
Sonata for Piano and Violin in A Minor, Op.34: II. Scherzo: Molto vivace
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 0xf80eecabe8fae63d41ddf46cbc09f9d5ab5e3cc4166f3197945b1aedf2e6f72a. 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/US4QP0454207.
Sonata for Piano and Violin in A Minor, Op.34: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6baf9a3c5e52fde1da1aad4e8456123510a3abdd0ab39bb60643a6a9f1ecd7. 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/US4QP0454206.
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 0x2aa967aa2770f9b8fff9b4b778d3405cd397d2eace5c4d6db47dbf7e360a3f4a. 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/USCRS2399206.
Music@Menlo, Around Dvořák, Vol. 3 (Live)
String Quartet No. 10 in E-Flat Major, Op. 74, Harp: III. Presto (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b925453af1883c526a22eb4d0b221cf885939596df3504707762456c03a60b. 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/US9P21400028.
Haydn, Beethoven & Schubert: Piano Works
From The Heart: 20th Century Music for Bassoon and Piano
Beethoven, Debussy, Poulenc & Others: Songs (Live)
Crumb: Black Angels - Jones: String Quartet No. 6 and Sonatina for Violin & Piano
Black Angels, Pt. 1 Departure: I. Threnody I. Night of the Electric Insects
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92790cceec37aa93dc897351f27b19120fc93b41c0aee232f0c88af5f267619. 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/USZC71128301.
Black Angels, Pt. 3 Return: XI. Ancient Voices
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb74ae932bcd7476a5fd9b772603e44275bb97b50d2ce17c962486f447c39a1. 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/USZC71128311.
Black Angels, Pt. 1 Departure: V. Danse Macabre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfa9a5ffe52b66559098dcf85a716cb9127b5e7f2ae58327fa4e7c1cfd9ea20. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USZC71128305.
Black Angels, Pt. 3 Return: XIII. Threnody III. Night of the Electric Insects
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3333da6d78aefb0bf362d2ad114d53dcac4869e594db2c3d14dbaf389db8e0db. 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/USZC71128313.
Debussy, Janáček, Hindemith, Cowell: In the Shadow of World War I
Hindemith: Quartet for Clarinet, Violin, Cello and Piano & Shostakovich: Piano Quintet in G Minor, Op. 57
Russian Songs - Rachmaninoff, Mussorgsky, Tchaikovsky
Romance & Caprice: Works for Solo Bassoon & Piano
Brahms: Complete Cello Sonatas Plus Intermezzi, Op. 117, And Trio In A Minor, Op. 114
Hale Smith: Innerflexions - Sheila Silver: Sonata for Cello and Piano - Joel Hoffman: Duo for Viola and Piano
Charles Ives: Piano Sonata No. 2 "Concord, Mass. 1840"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ca36ad885129724a3381cc0bcbf85e07a889d34d4fc86fdeaf572ebeab0c4d. 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/USNO10900147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e30899058811b770cb3654cfaa39df7d55066c374686749a1b8342ed1c7bacc. 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/USNO10900135.
Ives: 114 Songs - George Crumb: Apparition
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f32f73e4e827df0d2ead422cc6378788c65d5880be2ea530987ee9a67254ee. 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/USNO12000270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb20ee28a67fa77448c9af719fb1c687f7cda4b3c2b09e962ca96359668be4b1. 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/USNO12000271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281ffb856e282d53e1d1063ff33e71500ddbb7c8ee55baff4543eabe2d9af4a8. 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/USNO12000273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f306cce3d0384929fdcd297c84c6e532217ce92772845c94d042b7ec50437a4. 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/USNO12000268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd621af7eac4c1aa52ad7df7b807121795ceb5dbe609ea68e52e80a1d6c37c978. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USNO12000269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d96eeb3527bbceefee66e86b0c4473846deb6adaeb328ffa74299d76dffd6f6. 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/USNO12000272.
Schubert: Schwanengesang, D. 957 - Schumann: Dichterliebe, Op. 48
Charles Ives: The Sonatas for Violin and Piano, Vol. 2
Charles Ives: The Sonatas for Violin and Piano, Vol. 1