Frederic Anthony Rzewski ( ; April 13, 1938 – June 26, 2021) was an American composer and pianist, considered to be one of the most important American composer-pianists of his time. From 1977 on, he l
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 0xe28b372d1343d225b01d4f284b7dd9068bfd0ac3c5ed327cc21949d3f16fc762. 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/121fb182-8c58-4208-bbe3-277490a2b7ee.json and https://artists.proofprofile.net/proofs/artist/121fb182-8c58-4208-bbe3-277490a2b7ee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rzewski: Four Pieces, Which Side Are You On?
The People United Will Never Be Defeated!
The People United Will Never Be Defeated
Frederic Rzewski: Antigone-Legend; Jefferson
Rzewski: The People United Will Never Be Defeated!
The People United Will Never Be Defeated! (1975): Theme. Tempo I
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 0xcbf1b3354e1bd2c800ac197dc5c56779a86c0b5623bfef6fbfd288baea7aa837. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBAJY9907739.
Rzewski: Fred - Music of Frederic Rzewski
Rzewski Plays Rzewski: Piano Works, 1975 - 1999
Rzewski, F.: The People United Will Never Be Defeated
The People United Will Never Be Defeated - 36 variations on "el pueblo unido jamás será vencido"
Frederic Rzewski: The People United Will Never Be Defeated
The People United Will Never Be Defeaded
Frederic Rzewski: The People United Will Never Be Defeated!
Rzewski: The People United Will Never Be Defeated! (36 Variations on "¡El Pueblo Unido Jamás Será Vencido!")
Frederic Rzewski: 4 Pieces, Hard Cuts & The Housewife's Lament
Frederic Rzewski: The People United Will Never Be Defeated & 4 Hands
The People United Will Never Be Defeated: Theme: With determination
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f63daa4f37c336e8769d39b7744442d9401d022dcf0ff2544ca5da0825e8d8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USB8U1067001.
The People United Will Never Be Defeated! - 36 Variations on ¡El pueblo unido jamás será vencido!
The People United Will Never Be Defeated! - 36 Variations on ¡El pueblo unido jamás será vencido!: Thema. With determination
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4d28ecd1fc415486ea61413dd9b8260ebf2bd357efc2a3fed51ec4a1d3d124. 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/USSM11505527.
The People United Will Never Be Defeated! - 36 Variations on ¡El pueblo unido jamás será vencido!: Var. 1 - Weaving, delicate but firm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbb167130ffa6540e3761b2d7d51979b141b24dff00e59a56f87852c04d6ce6. 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/USSM11505528.
The People United Will Never Be Defeated! - 36 Variations on ¡El pueblo unido jamás será vencido!: Thema. Tempo I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ffceff6232fa5a6b46221653168b321a21a5cdc93ba9683a6260a56b7d425b. 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/USSM11505564.
Sometimes: III. Lullaby (God to Hungry Child)
Rzewski: The People United Will Never Be Defeated
North American Ballads: No. 4, Winnsboro Cotton Mill Blues (Live)
Speaking Rzewski (Pieces for Speaking Pianist Performed by Stephane Ginsburgh)
Frederic Rzewski: No Place to Go but Around
The People United Will Never Be Defeated: Thema. Tempo I
The People United Will Never Be Defeated: Variation 15 - Flexible, Like an Improvisation
Rzewski: Let It Shine - Winnsboro Cotton Mill Blues
Rzewski: 4 Pieces, Squares, 6 North American Ballads
Rzewski: The People United Will Never Be Defeated! (Live)
Frederic Rzewski: THE PEOPLE UNITED WILL NEVER BE DEFEATED! ／ SIX NORTH AMERICAN BALLADS
フレデリック・ジェフスキ: 「不屈の民」変奏曲／ノース・アメリカン・バラード〈全6曲〉
Rzewski: The People United Will Never Be Defeated! 36 Variations on ¡El Pueblo Unido Jamás Será Vencido!: Var. XIII