Ruggero (or Ruggiero) Leoncavallo (23 April 18579 August 1919) was an Italian opera composer and librettist. Throughout his career, Leoncavallo produced numerous operas and songs, but it is his 1892 o
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 0x593d0607260a342691619084016bec92d0ee5f51f7dd576347957fe9c9fe768c. 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/9415bfc9-d5f2-46fc-be2e-7472ee55f43f.json and https://artists.proofprofile.net/proofs/artist/9415bfc9-d5f2-46fc-be2e-7472ee55f43f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Airs d'opéras. Les noces de Figaro, Les puritains, Samson et Dalila, Tannhäuser, Othello...
Mascagni: Cavalleria Rusticana / Leoncavallo: Pagliacci
Paraphrase. Opera and Ballet Piano Transcriptions. Visions from the Golden Age
Leoncavallo: Pagliacci (Remastered 2023) [Live]
Leoncavallo: Pagliacci (Remastered 2022) [Live]
Ruggiero Leoncavallo: Pour Piano - Complete Works
Il mito dell'opera: Pagliacci (Recordings 1907)
Leoncavallo: Pagliacci (Recordings 1954)
Leoncavallo: La Nuit de mai - Opera Arias & Songs
Leoncavallo: Pagliacci (Callas, Di Stefano, Serafin) (1954)
Great Musicians, Great Music: Beniamino Gigli Sings Pagliacci
Leoncavallo: Pagliacci (Bjorling / Angeles) (1953)
En Aranjuez con tu amor (Arr. Maazel for Tenor, Violin & Orchestra)
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 0x77800e2bd4c3e3bdcaa894d8ec18966d3d4d8db7a9022a586c7a941e20753b33. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ITZ040200067.
Mattinata (Arr. Maazel for Tenor, Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb517f9bbe9d5d3b16bbd0fb9efa2eb7059c59d824a9d3e151554fdce863c84. 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/ITZ040200068.
Barcarolle (Arr. Maazel for Tenor, Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd20e41920926bc481e8b7bd52b9a148e407c827f0a88697d9276a9f4e1507e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ITZ040200069.
L'alba sepàra della luce l'ombra (Arr. Maazel for Tenor, Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4b6430add51efbadb1dc281f53e79b4d0c8671815976a239895fe8f116c34e. 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/ITZ040200070.
Sogno d'amore (After Liebestraum No. 3) [Arr. Maazel for Tenor, Violin & Orchestra]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd8675d5ed4f8699fa66aee4c663ac08472605f51b2f821b0e088e087fee57f. 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/ITZ040200071.
La Serenata (Arr. Maazel for Tenor, Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9396a9b5a5e2a20b03c1af0e549f492beccfa996a8ed5d206c12b761929fbc32. 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/ITZ040200072.
L'ultima canzone (Arr. Maazel for Tenor, Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47bf9b1706accf70e001cd9b7d2638e250daf62aaad33a691b6e89af2ef5db9. 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/ITZ040200073.
Malìa (Arr. Maazel for Tenor, Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9728db5dea0fecfa8ab7f859140083faa314de64d532b57e256d9ee447b20d6. 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/ITZ040200074.
La danza (Arr. Maazel for Tenor, Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9188aeb18b38471928103d4baf579368a259ca0a18522f12ac6dbe07d0d8906. 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/ITZ040200075.
Ideale (Arr. Maazel for Tenor, Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cda0f8733a37e63c3663ab0560dd50b0d1dea5f8931b2cdde8807b50cf51e5. 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/ITZ040200084.
Sogno (Arr. Maazel for Tenor, Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26d3974596b8bb87439ab3edb85233125188943355ea1ca187b91b25eb483d6. 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/ITZ040200085.
Plaisir d'amour (Arr. Maazel for Tenor, Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9630afdff35acbeee8aa3866866eb92aa1f2900a04c258180c1d4c0082e426d. 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/ITZ040200078.
Musica proibita (Arr. Maazel for Tenor, Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03edcf307b1b61c1ecead04939f6e71360e1b2d4ee6f936ce24e32d79a10d5b2. 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/ITZ040200076.
Occhi di fata (Arr. Maazel for Tenor, Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3815e8198e160fb0be00b472d36ccad951c83e837c3bf1313e034e0f475d8c0e. 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/ITZ040200080.
'A vucchella (Arr. Maazel for Tenor, Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce09e02f6a09d1e3675525616a88e66c5595ab80104eef1c98de9905c7e9b97a. 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/ITZ040200081.
Vorrei morire (Arr. Maazel for Tenor, Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1246fb18f68339a205ce824f1477f9154613204b4d31c4b230d3486d36bd03. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ITZ040200082.
Vaghissima sembrianza (Arr. Maazel for Tenor, Violin & Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdc70d045d4814619591d5b8958bca6959de76176f87e4bad284ef1e43d787f. 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/ITZ040200083.
Leoncavallo: Pagliacci (Gigli / La Scala) (1934)
Pagliacci, Act I: "Recitar! Vesti la giubba" (Canio)
Orchestra dell'Accademia Nazionale di Santa Cecilia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb308c943371a555fba5bd314b6067081b92ed805aec610d51201f84170bd1ab9. 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/DEHB51303042.
Leoncavallo: La bohème (Recorded 1958) [Live]
Jussi Björling (1911-1960) - Anniversary
Lebendige Vergangenheit Heinrich Schlusnus II
Die lustige Witwe, Act II: No. 10b, Valse moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b5f415d35aaa79c18f66d925b6887c680e616462e83bfec3996256783c8c59. 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/DEF057230414.
Ridi Pagliaccio Mario del Monaco interpreta Leoncavallo e il verismo
From the Heart: Italian Arias and Neopolitan Songs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226d234b7c6d434e7ed349b23b0b6a7cbc68c137a12e1c125ddc6ce91d4de143. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBF071401180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e37aa652edb9911f8657b48ec41b7606891ab52111760753c4f521f6880336. 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/USBC10402004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308c470b8523e6b8a70e33d091a0e5e532b2769d4a93b951f939dc6bc68a98ca. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEF056701270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226d234b7c6d434e7ed349b23b0b6a7cbc68c137a12e1c125ddc6ce91d4de143. 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/GBF071401180.
Mattinata - Wien, Wien, nur du allein - Amapola - Live
Orchestra del Maggio Musicale Fiorentino
The Three Tenors - In Concert, Rome 1990 (And Selected Highlights)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3425ae95104a90354f89217b5f099d4c7149ece50390870fbab678b84aa058bc. 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/GBBBA9050061.