Carlos Sadness (born 31 March 1984) is a Spanish singer, songwriter and illustrator. Biography He had been studying design while already uploading some of his songs onto Myspace. After a few year
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 0x9145239e2635f4b13a1f503675370f69256e4b107722aaef3d33e9288ec12577. 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/752b76c5-936f-45fa-aac2-a461aaf6e4fd.json and https://artists.proofprofile.net/proofs/artist/752b76c5-936f-45fa-aac2-a461aaf6e4fd.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 0x1fae437d75f0610a2101059df7cad6a6beb8c4d90afb47050b1ccaaf1cf81624. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/ES5021001061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf4f85b8797299cf1cd2fbb1d3d37f18cf1fb7005572199b542d8f8fe784ba1. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/ES5021001060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fae437d75f0610a2101059df7cad6a6beb8c4d90afb47050b1ccaaf1cf81624. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5021001061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0abba60e5372028dab6dcda989ed8bbf7f4bb5cbec564061388204f726cb78d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/ES5021001062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94dcd0adc5004b1a8320b9cb6a2eb0311e4df32c51df514b6195fb9fc815b5e6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ES5021001063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04717a60bd4f23e1c44333d0079f838716c0e4137b82856c600c162a04b76b8. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/ES5021001064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa776380c57648e02119111f1764318b33146c3f2b01a2380b12ed4616e842cda. 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/ES5021200763.
El Dia Que Hizo Mas Viento Que Nunca - Acústico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae90e3e4d1e6aef10d70545580bd65398e94eefbb777a33bc1d19ab546ad496. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ES5021301225.
Au Revoir (with Zahara) [Stefano Mendetz Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b66e50bd0b48f28c99e24ce30b76a8bc6519bbcdd678345c51ff1aa3c320c94. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/ES5021400813.
La Idea Salvaje (Edición Especial Spotify)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a90c0c4cc399e5cb49fa1f3e7708c2abb477b8836dd0dd05231a928de181732. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ES5021701639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640440df7af89c28ece755ac2cdd3d9ccddb540e8a46c4bed60878cdbc35f9ae. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ES1021800638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbe428ca86807605b3a6080656c16bf390bb9ccf80c8c4fac3af1a416b0cfa2. 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/ES5021901671.
Isla Morenita en el Wizink Center (Madrid)
Chocolate y Nata (feat. Bratty) [Buffetlibre Remix]
Chocolate y Nata (feat. Bratty) - Buffetlibre Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671ee2ae5f4b1cd510ebf5937354d033f9b8e2becb9d1edd7c68df749bd8f5ee. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/ES5022100608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe505ec8ee7a42218a56a498b36bbb4f6d4f735a3ffe71f6df20fbda1aea7e32. 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/ES5022202102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8458f96a75cc00e7727037e193935f6261a113589cd0a15add674307697eb987. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ES5022202194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9818ce60851e2271aaaef55bdb92b9bd6ab24ae957a5e8e52acaa1ffa0398a52. 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/ES5022400041.
El Día que Volviste a La Tierra (Auditorio Nacional México)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8bd61f6ab4ce5b35a6180fa8ef4844a86b834df7215b35a38934b5115717c4e. 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/MXF012100154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8bd61f6ab4ce5b35a6180fa8ef4844a86b834df7215b35a38934b5115717c4e. 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/MXF012100154.
Siempre Esperandote (with Ivan Ferreiro)
15 años entre canciones para el tiempo y la distancia (2005-2020)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5a6b2206efdc348c76e295444de121a624252e06a574f9dc24450993ca4c66. 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/ES5021200253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac951accb4d879844e48f42bc72e893109c43b37a3eea606d1888c1f87ead41. 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/ES5951705615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d67e7288506a5afd617d228d0c1bfba071a2b254a3b23a5ccf3dec70e294a1. 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/MXF012000221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d68480f3d33da52418b714a9e29c000ecdb0124010d11ac28f7b3a331304e4. 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/MXUM71801415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d68480f3d33da52418b714a9e29c000ecdb0124010d11ac28f7b3a331304e4. 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/MXUM71801415.