1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x08911f32fd9d1822ac531148033529e7fb659264c57d94de80dada1cb1c35ea2. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/38580920-f611-429e-8473-e5ceb46a4456.json and https://artists.proofprofile.net/proofs/artist/38580920-f611-429e-8473-e5ceb46a4456.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Combat del somni: I. Damunt de tu només les flors
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 → block OTSBitcoinBlock must exist at that height 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 0x99eb6ebbe3baa7bf78bbb2083b4ccde693bfc637bb17b3c3b2565a0bb8eb4f75. 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/USCGJ1650025.
Combat del somni: II. Aquesta nit un mateix vent
Combat del somni: III. Jo et pressentia com la mar
Canción de cuna para dormir a un negrito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d735fca7a5d0e5237a4dea4d1b81d7dc2252b28b1d54f5ef4453ac03f19529. 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/USCGJ1650028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a23eb739c2da0e29a016b9da7842473f7235e6abdda835fa5732463fc6badc0. 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/USCGJ1650030.
Canciones portuguesas: I. Ai que linda moça
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ac68b9dfc2cbf595c8017b2ce73856dbd772911ae405ed5d0349124097bef7. 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/USCGJ1650035.
Tres canciones españolas: II. Nana, niño, nana
Tres canciones españolas: III. Baladilla de los tres ríos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d70f00f22cb38e51f1bbb01df4624a651f0b13540f7ba327256204300c6e737. 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/USCGJ1650037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0b830f1f9bb9f8baa334496bdb5af5f8c0606b2613d0663087209e7fa35b98. 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/USCGJ1650039.
Marinero en tierra, Op. 27 (Arr. J.R. Encinar for Voice & Orchestra): No. 1. Qué altos los balcones
Marinero en tierra, Op. 27 (Arr. J.R. Encinar for Voice & Orchestra): No. 2. Casadita
Marinero en tierra, Op. 27 (Arr. J.R. Encinar for Voice & Orchestra): No. 3. Siempre que sueño
Marinero en tierra, Op. 27 (Arr. J.R. Encinar for Voice & Orchestra): No. 4. Verano
Marinero en tierra, Op. 27 (Arr. J.R. Encinar for Voice & Orchestra): No. 5. Gimiendo por ver el mar
6 Canciones Portuguesas: No. 1. Ai, que linda moça
6 Canciones Portuguesas: No. 2. Gerinaldo
6 Canciones Portuguesas: No. 3. Escolher noivo
6 Canciones Portuguesas: No. 4. Minha mãe me
Sinfonía breve: II. Moderato assai ed espressivo
Marinero en Tierra: I. Que altos los balcones
Marinero en Tierra: III. Siempre que sueño
Marinero en Tierra: V. Gimiendo por ver el mar
Canciones Portuguesas: I. Ai, que linda moça
Canciones Portuguesas: III. Escolher noivo
Canciones Portuguesas: IV. Minha mae me deu un lenço
Los Elementos - Opera armonica al estilo Ytaliano: No podrá (Recitado); De flores vestida (Arieta)
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ139410850.
El Barberillo de Lavapiès: No. 15, Aquí Estoy Vestida
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f5b97ede3e3128fe0798119bdbc79060eb8f13163e5fc08cf24dc09dfaf032. 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/FR2X41706128.
El Barberillo de Lavapies, Act I: Calle de la Paloma (Paloma, Lamparilla, Estudiantes, Majos)
El Barberillo de Lavapies, Act I: Este es el Sitio (Marquesita, Juan, Don Luis, Paloma)
El Barberillo de Lavapies, Act I: Lamparilla (Paloma, Lamparilla, Marquesita, Don Luis, Don Pedro)
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 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/FR10S1726572.
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 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/FR10S1726573.
El Barberillo de Lavapies, Act II: La puerta de esta casa (Don Pedro, Don Luis, Lamparilla, Paloma, Guardias, Marquesita, Majos)
El Barberillo de Lavapies, Act III: El noble gremio (Chœur, Paloma, Costureras)
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1726577.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1726578.
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 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/FR10S1726579.
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 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/FR10S1726580.
El Barberillo de Lavapies, Act III: En entrando una Maja (Lamparilla, Paloma, Marquesita, Don Luis)