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 0x8b8cc064ecfc57c60817a7bda2e799fac69542b56330a39b365c180c8c660915. 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/8161f302-fc8e-4169-9b3a-8ea4945f3621.json and https://artists.proofprofile.net/proofs/artist/8161f302-fc8e-4169-9b3a-8ea4945f3621.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 0x2fd99b8cafdcde0da28d40af5150ac94e618485b10490aa947e98e268a8345fb. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:25:42Z), 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/MXA0N2400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd99b8cafdcde0da28d40af5150ac94e618485b10490aa947e98e268a8345fb. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:26:07Z), 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/MXA0N2400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9eee304576e365574baf671812c7f6c68cf773fb6b67eddba4919c9d423b2e. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:30:29Z), 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/QM7281549798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671c88f8ee6020d60f0e0864083efa4a433cfbd17a8a7ca711a02448c0e5a01e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QM7281549799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0895704bb8822164d6a7d291e8e0e5a658a296c7389d54d885a1e616dac1c3c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QM7281549800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b2e981fb89e9983ebde42d84892ff2f580321f75f4e662e5ed1ce978cde950. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QM7281549802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c266f79bf0071f1e04d226b6009a3f01999fdd884bca422c51020681a7904d. 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/QM7281549804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d0b740412eb9cd501b11018af86c6b62251317d2dddb40386671921b26caeb. 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/MXF160301014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346ef727db10f998a3618591076163a4a2a67142ab1b4680418e55ab9ea1354b. 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/MXF160204611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f0c5152e6677320a94726b7e6de48ee38b9cb09591ea3d16bea5a5b6aa5d8f. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/MXF160204614.
Las piernas de Malena / Rico vacilón / Qué rico mambo / Almendra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe598839c8f36bda6eac1aa75124ce78c1cfc094cad91f560a32866d5bd4caef1. 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/MXF160202160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dba39247b0ec2521529760579de5d9c45aed0a6ec4f6a62782cca54ed926cb6. 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/QMBZ91593624.