Arturo Cardelús (born 1981) is a Spanish-American composer of film and concert music. His scores for films Buñuel in the Labyrinth of the Turtles and Dragonkeeper have been nominated for Goya Awards.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9973981b6fdde3fde79c7d6dd43840e86cd02a621bbaa26164fbad81c3c66fd1. 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/fb974169-7146-4810-ab31-3d2e1b9db5c2.json and https://artists.proofprofile.net/proofs/artist/fb974169-7146-4810-ab31-3d2e1b9db5c2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chiamatemi Francesco (Colonna sonora originale del film)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757b1b3c209c0468875d23500bfabf23ec1736280f2ad11cab96a44e53a793b9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ITW241500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad847ca05d541773fa933b50b69bbe5cf8eb0902c2414bef0afd463f62ac1137. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:48:08Z), 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/ITW241500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d54f216fa4c42ba8dc4476c364337159c7c3b6b4722673c2986c1600ccb3be. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ITW241500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe29625f06040c737005f26cc13109692b53d1f7475079b6bc80e8d7ba237be9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/HKI191508704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbc35538f73474d30db632fb5a0cfdff37eedb80a8db04d183256d872ef8d23. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/HKI191508705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f58862d8139a4eb1338fd168ec8302c6de7c98e9b729cfa7a627e54273a5d7. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:53:06Z), 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/USHM21777134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e205af6a3bdf682ce7fa928e6a7cc9d1f09e689800698d34544208cadc47b9. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/USHM81726896.
Altamira: The Origin of Art (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fdecd9ad51e96a6507b023bc4c68348844f3af27f00712304596e6eda51063. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBKPL1937792.
Buñuel in the Labyrinth of the Turtles (Original Motion Picture Soundtrack)
Buñuel en el laberinto de las tortugas (Original Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb300b38e86f0dc85869e3ab81f1d7b2a2e7c792d68b8980ec19bb4d860a8784. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRZ811905152.
Black Beach (Original Motion Picture Soundtrack)
Descendants: The Royal Wedding Score Suite (From "Descendants: The Royal Wedding")
Life and Work of Frida Kahlo (An Immersive Exhibition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2046543ed21c910b65b9e152cacb0845aac0659fc9d3a006aae57ab4f8c4e6. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ2272051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66f3c51206d80f0e7b1866300a31fd777fedd2d3a4451ef730c535e8072405a. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:07:18Z), 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/USCGJ2272058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d553cbfd16519138d10d375c6d40abab19e7e0f5fba850b58c0cdbb30c95ecd. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:22:18Z), 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/USCGJ2272060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cf7dbf7d1c73e953b8a64320258b404f2fb72eb7612e53ff410a77db0c11b4. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USHM22277872.
Dylan & Zoey (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43b4b09059c16d0c8d2e609e79c8d510b64dafd02f73108190763cf6a8a0706. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USL4R2336704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9eccc9afff29437f65f0d2e0ccad6950cffd032bfcc74caa753387e78f8e9a. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T18:19:45Z), 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/USDY42458511.
Dragonkeeper (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23daebfa6745e435790e5096c2050f3f4d4e3ec0fd9afd843024c6fde8cbf32. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ES84S2400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd084645073c56b890b6fd99999d362f5a976fcef80b7694cf03382ab06aa1c. 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/ES84S2400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8baf5cc8746edac379a58569290f19d826bb235540df375e2b777a6b67ecc8. 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/ES84S2400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed0fb231313261a7f06d53236dbc44f57da65cf24b8d5d32adce9e073ee4ac1. 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/ES84S2400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d3b81a76a1f441a54c46228614c11dbb55b6016bff239c8eb8538adc8ada1c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ES84S2400131.