thumb|William Vincent Wallace. Portrait by Mathew Brady, New York City, undated (Library of Congress) William Vincent Wallace (11 March 1812 – 12 October 1865) was an Irish composer and pianist. In h
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 0x8406203e85c0250cdf63095d893f8663db168c710002e8cab4112e0eefdd55c1. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2eda43d-f957-462f-a957-9bd66ecae09c.json and https://artists.proofprofile.net/proofs/artist/f2eda43d-f957-462f-a957-9bd66ecae09c.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 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 0xea63e5499778d9e93b53d748d3a9c24bf49f4d90f31259de25ad82af431842cb. 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/USB8U1072085.
Les Sylvains. Piano Evocations from the Golden Age
Two Concert Studies, S. 145: No. 2, Gnomenreigen (Dance of the Gnomes) - Duo-Art 081 Br
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e7e51a74b9377d8e397aca0a050c62b8de7032490470db236edf0a06dfd21d. 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/DEPI82439048.
Les Sylvains, Op. 60 (The Fauns) - Duo-Art 046 Br
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0753d7f3ec60ce7322701898f51ce26bead00d23a560af0b1904fd7f864e6b9. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DEPI82439044.
Toccata in G Major BWV 916, No. 3 - Duo-Art 72369
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1f68c6deb13a479df0677a8f4934b506bf1aa1b2beb2827eef9acb97fa61d4. 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/DEPI82439077.
Piano Sonata No. 11 in A Major, K.331: III. Rondo Alla Turca - Duo-Art 6228
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7815a64106cd518fd74d211ffebd818f9a46420597548e84429386577b074f0. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DEPI82439072.
Romance Sans Paroles, Op. 17 No. 3 - Duo-Art 5659
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2867bdfd7fbcbfe11437d8ac6e94f97c8322ae39ae9fe2c987628a662b17729. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEPI82439066.
Piano Sonata No. 25, Op. 79: III. Vivace - Duo-Art 0278 Br
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8ef8a4d28a93391786f87ad042567ce1bce337c3ca2abd67f67486478a5183. 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/DEPI82439071.
Piano Sonata No. 14, Op. 27 No. 2 Quasi Una Fantasia: II. Allegretto - Duo-Art 6102
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a1f24ffe12bdedc0f3f1f84bfad8fe667153f6f8e606df612929b3e2256110. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DEPI82439070.
Piano Sonata No. 13, Op. 27 No. 1: II. Molto Allegro E Vivace - Duo-Art 0287 Br
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047c902b4d3fb463698fb6fa4e996ddd635a3fdf53d76debdb5fa83dee00243d. 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/DEPI82439069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7313eee2ed30de813ba0484081d73fd6dd69d570c8811a71f484e1ed11a325ad. 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/DEPI82439061.
Six Minuets for Piano, WoO 10: No. 2, Minuet in G - Duo-Art 67439
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5424bda65ef3a6006c9c78c3024e6daeceb40e8f9252e5a60308342ea6a57e58. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEPI82439056.
Mazurka No. 1. Op. 21 in G Minor - Duo-Art 5945
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90364610d07f07a49beda9ad913903a671e1a4a9f70487c9c506e46ad5765918. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEPI82439053.
The Seasons. Op. 37A.: No. 11, Troika (November) - Welte-Mignon 1956
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a5048c7d7b95cb3f61b6371849db1d046583131e3299b051e11098f75b5626. 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/DEPI82439047.
Vistas No.2. In the Forest - Duo-Art 01 Br
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f84ce0c7eeb02e46bea150d07614f5f20b250de0fe1119cd8805e466675baaa. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEPI82439079.
Variations on 'Weinen, Klagen, Sorgen, Zagen' BWV 12 / S. 179 - Welte-Mignon 722
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6b874147323eda822205a321c910d02d201d6b8bce26118086e7f83ca99b3c. 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/DEPI82439049.
More Songs My Father Taught Me: Parlour Songs & Ballads
America's Singers Recorded: The First Generation (1901-1911)
Flow On, Thou Shining River - Nora Creina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7581115d40d03d0c61004a7eb925ead6c2453c09c19102fc028245b1503463. 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/HKI191120613.
Wallace: Opera Fantasies and Paraphrases
Elgar: Introduction and Allegro, Op. 47 - Rosse: The Merchant of Venice - Wallace: Overture from Maritana
The Band of the Coldstream Guards, Vol. 4: Opera Highlights (1902-1922)
Santelmann, Vol. 7 of The Robert Hoe Collection