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 0x1a04b8c62ce859ae1ad025dda7c1dd90d793152536f98d606f9114250f3db106. 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/5ee7b3ac-4eb8-4f56-9f6a-dcd025c9c7dd.json and https://artists.proofprofile.net/proofs/artist/5ee7b3ac-4eb8-4f56-9f6a-dcd025c9c7dd.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 0x8150b0ea52165537c2004d8ed2b929190db6a936558ecb52047f48a95691e5de. 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/BR6FF2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bad95043a1f551e47ade39128bd009f423f27fb37bd6b425dd14eb3cd976fa. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/BR6FF2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6c46448a8d4996bff73a986b29707b20855af6886663afd939ed32e0dfaf18. 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/BR6FF2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2f0eaae208186f08a11e6894ce9bf7a2a422ef30bba5031f999888acfbed71. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T18:07:22Z), 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/BR6FF2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d1390b95893a975a13edfd40cb9239b9b91f0c2613fa05d7f3536f41bb5f37. 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/BX1N32100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30993a349af208dd4a15f5f160783bedaab635da1c9a81c6f18e405b79a896af. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BX1N32100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f09ce75d382606fbf9becc57d0f4218f5da50917e1613ff76d68cc0b059ed77. 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/BX1N32100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ca0961bdbe9d53c7f7d868763c2c50d6d02c3781507ef30c3da1d194a72f0b. 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/BX1N32100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afb58b273c3f0d57443207ad1a882aa4843fd5e4b1c593322e8fa6bd8cc31f9. 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/BX1N32100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0218bda7129bf6e7b6ff0a06595cbb38c91659ed73a86fc813789c9349d8ac14. 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/BX1N32100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76df8113171ef51fcece71d564e885b8d65f38da4b7694d1ab635782f73327a. 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/BX1N32100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97cc52aa10e2d43ad395fadb1934806cda3647ff35c6d8f88442aa9692b10aaf. 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/BX1N32100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f382e5c4c9a5791958e220695f31dd009fe8b9fc0f61ba2e1decf9bb3ed03b4. 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/BX1N32100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543f8b0e4fce031f4d53f18fee7d0119b58f777b29cc104725beb34ea699d21a. 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/BX1N32100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba2dd237c6d582e8211c0b533ceb9441d511da74ae5987107da03c761eab9f0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BX1N31900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a2a2c45a087926dd09be96593aa42bc5616f66d7c3b9bd59696e0fad91f37d. 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/BX1N31900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3c9cad5f3b1a82b107e8c2a3ede681197335496f47b7397c71de27ac8e61d4. 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/BX1N31900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076277114ce8b42e1528f1eab2e25a7b919b4c823337cad0dc99ed6ea16a4759. 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/BX1N31900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae99f2751e4e2f0f6bf9ba6e324e3eee19fe2569da47961ce7ca736d294e2bc. 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/BX1N31900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd81797a3915103488a8aabe9293294add15780b563751f5c15b3a30b6a73dce. 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/BX1N31900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347352c885ab7c719132940b93e9da89bbad970fb7d142c0d060b4efbc9402dc. 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/BX1N31900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa736fbc14991966e6f11edb12b670e52e58e80b7db5dc87b93d747684c11edb9. 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/BX1N31900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ef3d6b227451b8f723a2cfea49d85af7702b31fb249595e040aa6dc12e4925. 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/BX1N31900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa399459f3947e9e6fdca4d844388da280e0050c8cb6c143f1717e9d385196628. 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/BX1N32200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348e8b374ca85fa5b32054040a063102dc0e6854d2dbac38b8735fc44b3b5c47. 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/BX1N31900014.
Toquinho - 50 Anos de Carreira (Ao Vivo)
A Casa / O Pato / O Ar (O Vento) / a Bicicleta / O Caderno - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43c4380ca1c53788c52a88a5cd4c8a855cfe391fea8fbc0220090c21bfd210e. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/BRCII1800012.
Toquinho - 50 Anos de Carreira Ao Vivo (Deluxe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43c4380ca1c53788c52a88a5cd4c8a855cfe391fea8fbc0220090c21bfd210e. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:56:01Z), 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/BRCII1800012.
Jesus, Alegria Dos Homens / Bachianinha No. 1 - Bônus Track
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed337984a2e4bb97ecd670035bf5b3b60ed78c0583e9395efc5b0ce299fdbb0f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/BRCII1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dce647b2b006fc81b81116f9c690eb0efa681e078f5137f46ad925e62389fd5. 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/BXSVC1900809.
Caetano Veloso Hoje: The Music of Caetano Veloso Today - Tropicália e MPB (Brazilian Popular Music)
O futuro é mais bonito - Organic House Version