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 0x4fc5a7a55c00837f74ae156f3778201ee87ce364002bd032a6bbb5f48ea66444. 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/a078fff0-e3aa-4b8c-954d-39e0d9d94ad4.json and https://artists.proofprofile.net/proofs/artist/a078fff0-e3aa-4b8c-954d-39e0d9d94ad4.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 0x507482da5d83e16a1d37c60f2b155fc6008ea515c9dd56fba0237ee24cdf46c6. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/ARG991022858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba0b5462ad9a4cb4670f0dcc2699b6bd02ea7083ef00e759c6b556dcff1ae75. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/ARG991023088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd7fbf58e21533fe1df855c4ca7a22e3bddcac525fcfff110ec858cb5e7311f. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/ARG991023094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd4ffc62036a620f36fd65fd1df222d981f70b1a3a887fbe182ae7ac5590b0a. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/ARG991022846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6998e84a773e460a53c28dd8f9b6ea8edc0553de0844622f9ffca79ada83fe2. 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/ARG991022852.
Enganchados (Todos los Domingos - Corazon Corazoncito)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1ae0c8877b9bff56473e3054f58c2fd5d3200a9f4963e92bbde353511c17ae. 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/ARG991014360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790e2502214a721051138eb471f93758c133a56ef0101754c98c2824c71bfc33. 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/ARG991014368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358d6f3398f2f20e5403ea48b618ab88a6514b24f23d0c879765ff3865698c8e. 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/ARF062301621.
La Movida Tropical: Los 100 Mejores Temas Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacdc8b7d4481919fd1070d8731d776832ca7c94644788b326c03d7e30424ba1. 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/ARG990901304.
La Movida Tropical: Los 100 Mejores Temas Vol. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed01c4a4ef01cf055ae261af9eea26ddc009c60b3903c671c37e3c054e0af9a5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ARG990901335.
Cumbia Argentina – Pasión Tropical Vol 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63eea8b587e35d7d9510d6ce42ecafacfb6ce7160eaab90e8722457c8bb75108. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ARG991009049.
20 años de cumbia - Los mejores exitos de 1990 - 2010
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1439441af4334cd20bc16f742e7ff1d3dabbd76775fd706b7f7d1647018ee8b. 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/ARG991005675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8212fda6e38de1808873028d6815bc57d9582725bc121fdbf0cd1e1de7056399. 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/UYB282119013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea90ac9b62637edb8a54be766dd4d32eac6812a603b75da2b96e67db45bf9445. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ARG991000639.