thumb|Rosen in 1973 on a tour of Southern Africa Charles Welles Rosen (May 5, 1927December 9, 2012) was an American pianist and music critic. He is remembered for his career as a concert pianist, for
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 0x3bc94eeb2727375c4c0b8614e431d272cb96836aeab1b0c35263929b8bace588. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a46551d-308e-43b8-9492-d3b737994faf.json and https://artists.proofprofile.net/proofs/artist/5a46551d-308e-43b8-9492-d3b737994faf.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 0xb4587380f17950b27dccdcb6650dacb415433c4477b436807ec77312f8c3ede4. 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/ITV701108201.
Anton Webern: Complete Works: Op. 1 - Op. 31
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4bc5ffb2b2aab58b716d327049990b33a0499a0699cbc0753cf5abac03731e. 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/USSM10212001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd71805ff1893395209318265028ac299734b4165e71614d19aeade3aa143c1d. 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/USSM10212002.
Fünf Lieder aus "Der Siebente Ring", Op. 3: II. Im Windesweben
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6003a9f183265373681fb0b3b186cc1e62ecf08b5e5404321dc5716312a38015. 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/USSM10212004.
Fünf Lieder aus "Der Siebente Ring", Op. 3: III. An Baches Ranft
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8ad45448e0e855df48f21168def00201dd2802d056b065f8a719d7b5fb1a2d. 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/USSM10212005.
Fünf Lieder aus "Der Siebente Ring", Op. 3: IV. Im Morgentaun
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c029109af80f3424b172ae7f6782d911c0e38ddbcb3b3bdb5525ff61ddd586. 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/USSM10212006.
Fünf Lieder aus "Der Siebente Ring", Op. 3: V. Kahl reckt der Baum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702ca9623a97475b24a1fdc467cb309d7cb4698abdc6c86b284f6d1bd6cf3587. 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/USSM10212007.
Fünf Lieder zu Gedichten von Stefan George, Op. 4: IV. So ich traurig bin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf746c0fbde1dfab55d4b3397b85c853e918f26c5f0cec976e4ac14d73a0ab20f. 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/USSM10212011.
Fünf Sätze für Streichquartett, Op. 5: I. Heftig bewegt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb193a20e6f02f6edc26d3d249543bae089c2bb884f980119adfc561efc75395d. 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/USSM10101626.
Fünf Sätze für Streichquartett, Op. 5: II. Sehr langsam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323f9e36d85a857e429b82569dc8840c002008c838957582ead09d3f06f3e5dc. 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/USSM10101627.
Fünf Sätze für Streichquartett, Op. 5: V. In zarter Bewegung
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cf440964ed32768a479163f223c74088c61226035ab016a9f467a3f5caef4e. 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/USSM10101630.
6 Pieces for Large Orchestra, Op. 6: II. Bewegt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5357f646dcae2183bab3042e6df29203b4cd915861b48ceaa8fe98024276c4cf. 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/USSM10212014.
6 Pieces for Large Orchestra, Op. 6: V. Sehr langsam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebc660feb400ef5933dd7e045e512ae7cde4a28a0c8cf17bee42ff55fd6ea17. 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/USSM10212017.
4 Pieces for Violin & Piano, Op. 7: I. Sehr langsam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e5b7d2862b2a5254ab52423009004869b84eb264d33ab3befd564925a06567. 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/USSM17100535.
4 Pieces for Violin & Piano, Op. 7: II. Rasch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29695b17bf442b99bad6ca2888859589baff8fa19f9689de8aef2e445375ee41. 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/USSM17100536.
6 Bagatellen für Streichquartett, Op. 9: I. Mäßige
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767355b16d2d2e0fca2f76deff9a10d88a93b08f9dab8035cb0fe704f7f4fc10. 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/USSM10212021.
6 Bagatellen für Streichquartett, Op. 9: VI. Fließend
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb99b1aedc97cbf8bef32a23be97ce218cc733249c95e1955f945587a6b0a8de. 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/USSM10212026.
5 Pieces for Orchestra, Op. 10: I. Sehr ruhig und zart
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c3cdfa272bea04ea577b838dbaddb3ff63086782078b96154eaddea0e3b1ab. 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/USSM10212027.
5 Pieces for Orchestra, Op. 10: II. Lebhaft und zart bewegt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d577639bec166eeab9bf935cbe75685ecf6a2c5b3c36b1d4353f6c95e98708c. 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/USSM10212028.
5 Pieces for Orchestra, Op. 10: III. Sehr langsam und äußerst zart
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc397072fdbf02a2199f4161d06431db148d7774da3c2e8c80cde342183488e3. 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/USSM10212029.
Vier Lieder für Gesang und Klavier, Op. 12: III. Schien mir's, als ich sah die Sonne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6b480e23f34f66232280a66104312d4fe3ab365f5944cbf5be23f89fe5e1e6. 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/USSM10212037.
Fünf Lieder aus "Der Siebente Ring", Op. 3: I. Dies ist ein Lied für dich allein
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb93b8988e9914399c97db828dd2b76fd78d32fb4bb2f1ff7298554acc376d64. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USSM10212003.
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
Fünf Lieder zu Gedichten von Stefan George, Op. 4: II. Noch zwingt mich Treue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5469511752b4d364aa7d7bd678a6ad04d25c1614419e69c18f02808ddebf6263. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/USSM10212009.
Fünf Lieder zu Gedichten von Stefan George, Op. 4: III. Ja Heil und Dank dir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4c61a7330f211b097dc43fc5d6d44b53a1c4f51c93f0d8e5bf5912470d0e17. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/USSM10212010.
Fünf Lieder zu Gedichten von Stefan George, Op. 4: V. Ihr tratet zu dem Herde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3988278856544c4678d8ffbb82bbd1be47fcd321ef5a4cdd7734819c514a2c5. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USSM10212012.
4 Pieces for Violin & Piano, Op. 7: III. Sehr langsam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf4aaad90f174a8425ad103131238209611da1c0665a6c22042272b3eeb04ed. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USSM17100537.
4 Pieces for Violin & Piano, Op. 7: IV. Bewegt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21639a4e399cf19e171a82fbd2ee8913ac1e557ca85a936d953174303e36f9d4. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/USSM17100538.
3 Pieces for Cello and Piano, Op. 11: I. Mäßige Achtel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782aab594c1e611d46fc4b0936e5bff5fa4a3dfb36b8d9647d6ea8951014a342. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USSM10212032.
3 Pieces for Cello and Piano, Op. 11: III. Äußerst ruhig
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf6a801a2539326cf77d30a09abd0949cbde69fec7a18d3fcbe835e2002b52a. 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/USSM10212034.
Vier Lieder für Gesang und Klavier, Op. 12: I. Der Tag ist vergangen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6101103cf987735b830fc29b32a97f27661968dbfbc83a14794d9d9a68892d9d. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USSM10212035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55895ee51339be17027ec395dcb94ceb99a57e11e41b2e59708c369677eebe4e. 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/USB8U1020768.
Music of Elliott Carter, Vol. 3: Complete Music for Piano
Beethoven: The Great Middle Period Sonatas
Charles Rosen Plays Chopin – 24 Mazurkas
The Revolutionary Masterpieces, Vol. III
Beethoven: Piano Sonatas Nos. 30, 31 & 32
Beethoven: Piano Sonatas Nos. 27, 29 & 28
Carter: Variations for Orchestra & Double Concerto for Harpsichord and Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3e47c917550ae2f638e530c6c1d89f924b6c061fa6bfffac8a75c8b3b78b39. 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/USSM16500894.
Chopin: Piano Concerto No. 2, Op. 21 - Liszt: Piano Concerto No. 1, S. 124
Schumann: Davidsbündlertänze, Op. 6 & Carnaval, Op. 9
Schubert: Piano Sonata No. 20 in A Major, D. 959 - Mozart: Rondo No. 3 in A Minor, K. 511
Carter: Double Concerto for Harpsichord & Piano - Kirchner: Concerto for Violin, Cello, 10 Winds & Percussion
Charles Rosen Plays Stravinsky & Schoenberg
Stravinsky: Columbia Modern Classics - Octet for Wind Instruments, Symphony in Three Movements, Symphonies of Wind Instruments,
Ravel: Gaspard de la nuit & Le tombeau de Couperin
Brahms: Variations sur un thème de Paganini, Op. 35 & 16 Valses, Op. 39 (Mono Version)