The National Symphony Orchestra (NSO) is an American symphony orchestra based in Washington, D.C. Founded in 1930 by cellist Hans Kindler, its principal performing venue is the John F. Kennedy Cent
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 0x8a649f3178ce7b6c94185b773a86250b03e3ee860cd71e9ce3812aef085e20ef. 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/fac4e7c6-fe2d-4cf9-a551-b52f015fc292.json and https://artists.proofprofile.net/proofs/artist/fac4e7c6-fe2d-4cf9-a551-b52f015fc292.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x90773348b5a73e417dfe7639d682545c0e8a2ee981cede766ca4b7e4ca5a120c. 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/GBFFM1990001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbfd47275073709d1cc0195fadcbc8730e01264d5450597b28dba697726660d1. 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/GBFFM1916702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bc761e0f1b22de4d111b31e8915af6853401e0e9b918ae6699a2b6b9d6b1d5. 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/GBFFM1990005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16651282bbdb8fad40f58ff9fa2bd567b046fcacede430d0afb297434c3f95c7. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T17:01:14Z), 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/GBFFM1916703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a63341117519a1630820d00d1c4223eec6ffd67d40c94e92dcde944374b5d4. 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/GBFFM1990002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa876a49c807775a7994c74e5c1f7a7d94c1c65b1df03e32561f5939a752c771b. 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/GBFFM1916685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c1f35414dff2cbe916370c878820aa326cde2d6886ee7b5665a5ba6cb5bba5. 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/GBFFM1990004.
Aegeon Sea (The Music Of Apollo & Marsyas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36f72ab618e369cccc39fe6de0d0145fac42ca2f4d886467d7deea57a9a51f2. 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/GBFFM1916978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10e7070e75d5af00a7225db6a10d45f3043af7a2ea000271c36ab6061c12a12. 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/GBFFM1990003.
Voyage Of Scyrus (The Music Of Sisyphus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad49686224e7c276972da2407a0683b99c3ec58aa23c1b2b3c510db9820e0ab1. 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/GBFFM1916692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36f72ab618e369cccc39fe6de0d0145fac42ca2f4d886467d7deea57a9a51f2. 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/GBFFM1916978.
Conductor's Gallery, Vol. 5: Albert Coates
Villa-Lobos: Bachiana brasileira No. 5, W 389 - Sibelius: Luonnotar, Op. 70 - Ravel: Shéhérazade
Sullivan & Co. : The Operas That Got Away
Chopin: Piano Concerto No. 1 ; Schumann: Overture, Scherzo and Finale for Piano and Orchestra
Bohemian Concerto for Piano and Orchestra
Brahms & De Falla: Piano Concerto NO. 1, OP. 15 - Nights in the Gardens of Spain
Dvořák: Symphony No. 9 - Copland: Billy the Kid
Mozart: Marriage of Figaro Overture, Piano Concerto No. 21, Symphony No. 40
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555163ec296747118d5ce5434ba1ea017eb2392bb8f12ee8fbafdb16fc8ffc56. 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/UKL8J1900052.
Jaime Laredo: Mozart & Bruch... Violin Concertos
Michael Kamen: The New Moon in the Old Moon's Arms; Mr. Holland's Opus - An American Symphony
The New Moon in the Old Moon's Arms, III. In the Moonlight: Scherzo III "The Gathering of the Spirits"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aac9a69c6f6ce34307a5b6a9720427be7d780edac8db67829121b5b2fb5441c. 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/GBBBB9902906.
The New Moon in the Old Moon's Arms, IV. 2,000 A.D.: Reaching for the Stars
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c470df6523ea0f42dd687542705bcae107759c397de34fa009e855fed6c0de5. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBBBB9902907.
An American Symphony (Mr. Holland's Opus): III. Marking Homework
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced967e1331123a136ec63907e811cbb55494f8831fb4607a3b89d8f88cf4743. 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/GBBBB9902910.
An American Symphony (Mr. Holland's Opus): IV. Rowena
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830f8794b8b47511bc7372939e5ceb758116cfd0b04e44c038d5b45520d75416. 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/GBBBB9902911.
An American Symphony (Mr. Holland's Opus): V. Finale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fb1d74ea7284be8a1fe72519889497f020a5cad879154ba37895dd5209f6f8. 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/GBBBB9902912.
Prokofiev: Symphony No. 6 & The Love for 3 Oranges
Corigliano: Of Rage and Remembrance & Symphony No. 1
Stravinsky, Mussorgsky & Rimsky-Korsakov: Russian Masters
Shostakovich: Symphony No. 5 in D Minor, Op. 47: I. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdce60999a4bc81ef1194f2238ec18b6659dd2400396f0d58d7427b8b222c3b0. 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/DEA809432801.
Shostakovich: Symphony No. 5 in D Minor, Op. 47: II. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecee4c6a91622e3cd884c938900bf98babea40835a10988182d4a25329cb8424. 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/DEA809432802.
Tchaikovsky : Symphony No.6 Pathetique & Romeo And Juliet Overture (Coates Conducts Tchaikovsky)
Shostakovich: Symphony No. 11 "The Year 1905"
Mussorgsky / Arr Lloyd-Jones : Boris Godunov [Highlights] (Apex)
Shostakovich: Symphony No. 7 "Leningrad"
Shostakovich: Symphony No. 13, Op. 113 "Babi Yar"
Glazunov & Prokofiev : Violin Concertos (Elatus)