Francisco Asenjo Barbieri (August 3, 1823 - February 19, 1894) was Spanish clarinetist, composer, and musicologist. Barbieri was a well-known composer of zarzuelas. He has been referred to as the “mos
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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 0x185b6d71364d3d5ebfdaa8a763dc87c6d5fdc3d1566b92da06d021548e3f54ba. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/546bdc9e-b479-406b-afc6-36f9cd9f438f.json and https://artists.proofprofile.net/proofs/artist/546bdc9e-b479-406b-afc6-36f9cd9f438f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
El Barberillo de Lavapies, Act I: Los Señores Madrileños (Majas, Mayos, Estudiantes, Vendedora, Lamparilla)
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 0x9e0cfa8baab84f1a539b736f8ed72b43ee556d60d7c36d988215ff371efdc268. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1726566 — a six-check JSON result.
El Barberillo de Lavapies, Act I: Calle de la Paloma (Paloma, Lamparilla, Estudiantes, Majos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240e49a0e2c21077349b83afff3fff4a61069f534b26a826f79558c0fa665a34. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1726567 — a six-check JSON result.
El Barberillo de Lavapies, Act I: Este es el Sitio (Marquesita, Juan, Don Luis, Paloma)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae583832eeb8417a101704c3ee3383636a7ae4840eaa92cb271698a058294c3. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1726568 — a six-check JSON result.
El Barberillo de Lavapies, Act I: Lamparilla (Paloma, Lamparilla, Marquesita, Don Luis, Don Pedro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6eb275c2304c89f99829048fee1c66de408517c60702c5cc11a53a4be0ed89. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1726569 — a six-check JSON result.
El Barberillo de Lavapies, Act I: Ya los estudiantes (Estudiantes, Chœur, Don Luis, Don Pedro, Guardias, Marquesita, Lamparilla)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083a344e9ecf02f24d4a7649b7343585319347087285ea772dc5a1a0fd1d5e8c. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1726570 — a six-check JSON result.
El Barberillo de Lavapies, Act II: Enscena y relato de Lamparilla (Guardias, Mancebos y Parroquianos, Lamparilla)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9749586b25062a532e136d1690d3cfc8cdd79df5c4147d0eecd71a186ec22c96. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1726571 — a six-check JSON result.
El Barberillo de Lavapies, Act II: En una casa solariega (Don Luis, Marquesita, Paloma)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1a33eaff9198d246377ea91379821500ed01e6954000655d489d41472289fb. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1726572 — a six-check JSON result.
El Barberillo de Lavapies, Act II: Una mujer que quiere (Paloma, Lamparilla,)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f6e6c72d8abe0483fb9dfa886eb98e4b9265258a7e7db4ba467a4c6c0adce1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1726573 — a six-check JSON result.
El Barberillo de Lavapies, Act II: Seguedillas manchegas (Lamparilla, lope y Mancebos, Guardias)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2bd62b1f8cc92ff7fd1e1d3aa61daa185dc5bbd2f2fe058e37c0088b822c80. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1726574 — a six-check JSON result.
El Barberillo de Lavapies, Act II: La puerta de esta casa (Don Pedro, Don Luis, Lamparilla, Paloma, Guardias, Marquesita, Majos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9ef1a24fbdfb3777baacb9e54eaac88e616d035d5802ec80a9943e99f9f622. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1726575 — a six-check JSON result.
El Barberillo de Lavapies, Act III: El noble gremio (Chœur, Paloma, Costureras)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22b56d617ec43a303b69a36dfb121d0c3562016e2b0a7b4d5813f4cef2b04c0. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1726576 — a six-check JSON result.
El Barberillo de Lavapies, Act III: Instrumental (Paloma, Marquesita, Lamparilla,)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7a3db5418b85b9afbdcde2737bbdde2017e70e1c0e3ca5928ebed020c62e5d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1726577 — a six-check JSON result.
El Barberillo de Lavapies, Act III: Aquí estoy ya vestida (Marquesita, Paloma,)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf36a4254bb36dd64a84589522b11574ad61549c398ee36c9abd017af4a8641. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1726578 — a six-check JSON result.
El Barberillo de Lavapies, Act III: La Calesera de Lavapiés (Lamparilla, Don Luis, Marquesita, Paloma,)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca7325d10bb0c38b45b503e37d617acdcff2cf2af5f68614c739569eab01861. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1726579 — a six-check JSON result.
El Barberillo de Lavapies, Act III: Aquí están los que buscamos (Guardias, Costureras, Don Luis, Marquesita, Paloma)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b18b0e8fbfc1d67dc77cdc1770991a3ab69719a147320abf27c6a0174372cdc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1726580 — a six-check JSON result.
Francisco Asenjo Barbieri: Pan y Toros [Zarzuela en Tres Actos] (1956)
Francisco Asenjo Barbieri: El Barberillo de Lavapiés [Zarzuela en Tres Actos] (1958)
El barberillo de Lavapiés (Zarzuela en Tres Actos)
Barbieri: The Little Barber of Lavapiés, Op. 56
Otro Barbieri - Francisco Asenjo Barbieri: Complete Spanish Songs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7279198b081eb4050463b1cbab2c6324a15a997b660f3ebdc9ecdf20acab01. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5021702695 — a six-check JSON result.
El Barberillo de Lavapiés: Canción de Paloma
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3173f6677e21f6aaad4a055f1f76f381fe794acf068bd3525b45b1d9c3cf514. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961000490 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd99ed3c6803bec4f61120cfe926d8b6a0de768ed7627d1fe63addeb0a0fb0e. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLC359501409 — a six-check JSON result.
El Barberillo de Lavapies: Jota de los Estudiantes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1b0252bf98d1223592bad4f87614dc453630aec0305ac8c679df7c953f19e5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ139410880 — a six-check JSON result.
El Barberillo de Lavapies: Entrada de Paloma
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86498ca0a106320e88fb3eb5346ea7f766d226de8c5fe4630871eafafbae5fe5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ139410850 — a six-check JSON result.
El Barberillo de Lavapies: Seguidillas Manchegas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1391f8705ab96a6b92dc450bd69f17c8a34b0652e205d6a9f5679c32c5107939. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ139410920 — a six-check JSON result.
El barberillo de Lavapiés, Op. 56: De la zarzuela La Paloma
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be2490ea4d9aaae8e46e7483d638f1894e2383f7b7a2ef4f9e1ac0333319e0c. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5151802498 — a six-check JSON result.
El barberillo de Lavapiés: Seguidillas Manchegas: "En el templo de marte"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb879b19add89fb26f197ec9eb0c5aaccb6bebd7670a027cf680340f5fa5e9f12. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA506710070 — a six-check JSON result.
El Barberillo de Lavapiès: No. 15, Aquí Estoy Vestida
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f5b97ede3e3128fe0798119bdbc79060eb8f13163e5fc08cf24dc09dfaf032. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41706128 — a six-check JSON result.