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 0xa113e2273eac992c128edff6140e08542934f5bafc9ca0449054092bdab142f0. 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/e5cd99a0-4713-4fe9-b8ae-6e6c15003cb8.json and https://artists.proofprofile.net/proofs/artist/e5cd99a0-4713-4fe9-b8ae-6e6c15003cb8.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 0x0ec4429d84f5420b61a602aee8e9e8591dc79b314593facf09c9fffca3d10f76. 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/USHM81696163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b12fa54e7ac4d60925dab4ee826ff7a4b6379afcbcb51a946494edcc7e4bb3. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/USHM81696468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2913548a8eb9ec207a666a84d4dbfbd742c02525d1713f9e2897471acfeab5f. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM81696470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59733249c57190d7af6ef2b4887dd4704aa6c9b2990014f5493de061a9ac5573. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM81696471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd56324d0fedfd238a1940fc538e623fdb53226ea7f942f657ee9d343ff9a81. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USHM81696475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542b3a3269a08cddccdc2b768dd65b70f896a157aa11dc5e2ec47d214f94626c. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/USHM81696477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49533b46728bd3d51b26b12d929478326034fd68e055f3fe92975945b0e776a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USHM81696478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff1a015874e0ef294d8ffb58001d183a02eb86a69c7caef32def6ea902cc1c4. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/USHM81696479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adb59c499e03030d4785d0706cbf6d370cb25a49c598b4a863a01f0318756ca. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USHM81696480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395479637963cb990ad05a702674a88ee095ccc92271c8c7ec259fc230af8650. 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/USHM81696481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd727ec90d6a3ffe09a90ee0ee88cfc0aa623e6e79a1250960a5ec05cde8bd41a. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USHM81696482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4be2230e53c7d445035ec82796cb2ad80bbb952ba43d6be3c24a4e30d50279. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/USHM81696483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3b9d2f31c9dc3cbdb0deb3b594daf7439fe4eacd31ed19f31969a42bcaac9b. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/USHM81696185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9931a7d8edc79be620d79563a7d406477a53c753ecfb7cc3adadbdf2f2b10d97. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USHM81696486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9914b308ebc99378f1bec9b730c2d5e89dbf775999d20c70c0fc7b1000792494. 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/USHM81696487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4250dab9eab6753efe0e53d3bc8dc808c8f3e1043fd23c2952878fb117173378. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/USHM81696488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a096d6bb9c755e7112729bb82fed6dcb0d1e091165ef6318de29cf3e2eeb8fb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USHM81696490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1bcf2f874c29408e62571ec9df8edf9377f9ec324a781a62d26006f6faa656. 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/USDY41561408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630d8dafe356bf260093dfbe1c4e6b70951473c97886bf28511a1eb1ba67e425. 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/USDY41561409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979f9459e6234d4e2a84351fabbc097009ee3ad4982295012a50392c6055b71e. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USDY41561412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa495293d780bae1fdf8675146a3185573d3cb05516c2f99f92d4cc6620441107. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/USDY41561413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f1ec9e57892386b4092d23f8f5dc89f01474c975a1cd017254d1a8889b67ef. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USDY41561414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa478d87ea850a62d7a11fbf1b43ac6c3c62d81286f32fbf468f17509c9962844. 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/USDY41561415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe32ed4eb4035f25c51d549cbddbd446f212bb62d7b77004788b577bca2118b5. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/USDY41561416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7a06de7050adf2fc5ce2abfc5024a1c2a0f8294c8482c11df58bb2f648536d. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/ARF112000058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c917da76caf34cae5ae7daa852b3ba426a0e12f9c3ce5a5bcfa1df1276b0a9. 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/ARF112100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad8eb1c6fed67d6b5467db7dd5bf8858b56a63a29e18f1de63ab241087d3960. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ARF112300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ff68332e8fc14c5952a9859663986c395cde79bca04b8a50c94362024af988. 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/ARF112300199.
Música Sin Fronteras: Los del Portezuelo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a761c492fe769cf294f682404dda32882b0384bed1e28b99f75068abfa3714. 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/ARF112200030.