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 0x5e19df34f33a563c5637aeb21db0c8f31ef06abb159eebb064323ae5368c2c6b. 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/f1a0cf8c-9493-4e8a-a1a2-09e69332ebc3.json and https://artists.proofprofile.net/proofs/artist/f1a0cf8c-9493-4e8a-a1a2-09e69332ebc3.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 0x50683d18cf052d90c3dfece0db744336286b598e09051c40ae47a0dd2ed79296. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6XW2386539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e14c34ab68fc9033bc87b6405a11a4ac919717c4f0bfd387ebd8476d0746282. 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/ES8402200089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48023b78c11bcd91a1ea4c9e6be49e3b0b043ad147919a5b39ec8aa9c9c6247. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES8401500219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c1138322cfa7d21a83c249646f8dc7be0fe676ccff90f189dbc0ab10f2087a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8401400775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d665e46a8e37c6fd916c24a17a008d825c8477f66fecb718daa6d501779a6b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8401400539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf6f1454d45e7e5246186f3a4c9a67574edb57369c11818b31687d659bb41d7. 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/ES8401400543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9712f13a529f449a8bb10692a3aff4228c21bdc3c46f16f1d66c6a4e2d9f75. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES8401300892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c9977a62d87b7aa15f2ac8335dab3d7c2f6410630212b9e421489f23d298f0. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8401300895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527728c330164ba63ca1729226941e52b63208feca949d4029d582b4874bb8c4. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ES8401300899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41e5325369e232e40985c8736c86a3d84f65e73fb21aded4179afebd8781a69. 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/ES8401300900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed07f91b6f002ebc3311591f57decb610ac74689923476c2e7cb4eb24c19f18e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8401300905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef25d018fa2bf1ab9bfb2ece6e9dd7b0a9dead2576d2894a4b8d4e908c28589. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8401300906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa1b9cf1168bfa75091967366468d8e7384ba05af9a834f2602adfeca3b7e4a. 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/ES8401300907.
Las Mas Pedidas (Lo mejor de Pepe Benavente)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ff16a6ca926db09a0ab26711d7a004e163f3d82e4579d152ea76a2afd93c3a. 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/ES8401302146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828047188298eae0ea57900d8515df0c823385a6d79a9cef41119e9650a7e82c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8401301924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b77251a4e6265c1119f3fb85c7d9e77526a33171e20c3b1a09cf647681b06ac. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES8401302813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94408e9d122e93e39255bc741dd96fefefaddc820c989e7a5b80702040f86589. 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/ES8401302286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588809a49cad9055db913949e810ade18ac099e25bdfe1af929cf8e23e538dd8. 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/ES8401302100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2988ea869df1577e726a3e26d6e9fb7152606017639d6bc7d98cc8cbd487cd. 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/ES8401302102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8329a54ee1be249329543aacff5c6a3ee7c20a915a140b4ea2e031e790db5f03. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8401302104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479b3a39d37e0afb3c514c4f1466ce547536e20f842662e81a5342bfcb0b0e08. 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/ES8401302105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc099c8fa5088c3a6c4dd615ceecf4a1c23fdb7ff17539a5c7cb935746315c4f8. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8401302219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0272ed8e11a6e00937f35fa108fbf1f0de44cb92c291354d7ece45788257a7. 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/ES8401302231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560897451e73ffe49efaaeaad5bfe0fffc7bfd1859fe3d88ac4e7c1938b10f1d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8401302132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57467e2f3ec3aff48ccf974c77c622ac4804bf1ad182933070095d0383cb0e5c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES8401300326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851bbe6d27693b6a5834a14b526b725ddab5e59337ff62074cf6d0cb735c5279. 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/ES8401300330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea3fb6dfb393ec8ea5da9da8d9fbe0c6b73f571ffa03e90c3c3d4ebba6cee86. 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/ES8401300333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba101476b6e1038554da1185b92bc3f0f38d2fbd5b0971e364fccba6d183c275. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMEP2387124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd91b83b9563068290dcb72af8c8221d7f43fa3664e402253f2ed2ce07a59fd. 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/ES8402200038.