Leon Botstein (born December 14, 1946) is a Swiss-born American conductor, educator, historical musicologist, and scholar who has been the president of Bard College since 1975.Profile: Leon Botstein,
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 0x03d6ff1b7509259e35667ec5413a9fbfee2fa99b73c8eef2213c807378a8bf74. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/acb4f1b4-ca6a-45ca-8c19-6a1d119049c6.json and https://artists.proofprofile.net/proofs/artist/acb4f1b4-ca6a-45ca-8c19-6a1d119049c6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Lost Generation: Apostel • Kauder • Busch
Bristow & Fry: Classics of American Romanticism
Rubbra & Bliss: Piano Concertos (Hyperion Romantic Piano Concerto 81)
Ries: Piano Concertos Nos. 8 & 9 (Hyperion Romantic Piano Concerto 75)
Gershwin: Rhapsody in Blue, Piano Concerto, Variations on "I Got Rhythm" & Preludes
Piano Concerto in F Major: II. Adagio - Andante con moto
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 0x2c39d366e0bef61c950f821c8ed7f66bef86f1fde078686f419fd7c2f4e3b170. 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/GBBZS1626002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7b3ef2ef5974d519d0df3e5ca11830e5a242d6851936981083ad181aef34f5. 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/GBBZS1626004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec568c956dd34d240b67cd89cc68810b08fd8995e28b2b8b6832ac1828647ef4. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBBZS1626001.
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 0xe6a76e3b06612d3c24ebcd530108e3792d9d6ea420b1ae084072663f19ec1faf. 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/GBBZS1626005.
Schubert: Symphony No. 9 in C Major, D. 944 "Great"
Saint-Saëns: Le déluge, poème biblique, Op. 45
Schumann: Das Paradies und die Peri, Op. 50
Bruckner: Mass No. 3 in F Minor - "Great"
Shcherbachev: Symphony No. 2, "Blokovskaya"
Stanford: Concert Variations on an English Theme, "Down Among the Dead Men," Op. 71
Enescu: Symphony No. 1 in E-Flat, Op. 32