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 0x4910911d2ef3f61f9eff3a02d82ecb420e18f24322f4f10e2920ae5803f9f090. 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/103a0e99-5160-479d-afe6-d7d84a039d67.json and https://artists.proofprofile.net/proofs/artist/103a0e99-5160-479d-afe6-d7d84a039d67.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 0xff783e8185840cae0498004e84875c846197c3c1c02959ef5b982951977104ec. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/TCABJ1261592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07adb2dc79798266cc207a476cc6011557918abe8a01ca3f93872337ba352ff. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/TCABY1447167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f813d7c996d5463190bb86fb3e9de5c4178e91b7c82dd1288c6944e3f333351. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCABY1447171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6336aa617c4bed6bc71a062c8e6b952a20f37e158195df4a057637950cc6bd3. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCABY1447178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28552d47f9260eb6846ae5d79bfb2d1d5ce57fc7505e852cc4d35929974282b. 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/TCABY1447222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2606e5fe4dbd6625549f4af74a1b9451fc497491df1f66da7232f677b447e74c. 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/TCABY1447225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb2390f675fd3b88ba1f44abc3c37f90ffe3f6e1983abd622385d654e7c2b7e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TCABY1447230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce28981426675d159f6b04968f9f645fd9ec66eedf161313e03f0c088fe9f85. 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/TCABY1447231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10115b91e465ff1de6e70f12cdacf46a8b0244f2b1d213cf1b5e806f0a20a75. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/TCABY1447234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b8d042f897a72b4336e4cb8a5a7212d9a7d89327fe138ccdef44cd4e6b3aa8. 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/TCABY1447235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9061e90e27099427b9c952499689e5ee454e98b5dbeb581975759e95c22368ea. 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/TCABY1447236.
No Era Necesario (feat. Willie González)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19409283ee66cbb023ee75ad1890120b2603e2bc82b2dfa1151742c4e6eebfb. 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/TCABY1447244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d474b11e9bf5b46eaca6003126696b98e76e4bbe487d1b983d0f75f94b03d8c. 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/TCACD1509987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa73cdd8ca391eb14c4c4854df6030323bbcfa8a4153b53199143c90564b9a48. 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/TCACD1509996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d2c2b882a510222c10015fde2436970c33a431305b5980b08bd3194e4b55a8. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/TCACL1641413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e040a8e4e8d772a689bb11cdf5702fb3385f8334f0eaf34e80faa766a54a0a. 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/TCACL1641427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18141825051c9d984a6df0335059436ce546fa852e1690c4e6e9045f0fe3de19. 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/TCACL1641434.
Tus Ojos-Mírame Mas-Ay Cariño (feat. Alex D'castro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5036d299fdb33749d8b5aa35017a0c9ff860e8723fbad1fc8578aa75839595c. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TCACL1641436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6085aceaa012bfe0a3a7bfcf5dff83a33a1601340b5d4a6da62b1c749c82edf. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TCACL1641439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7167c27425ad382c05daaca2e81f7e4a3157a19d00914a95c6c53387e332c136. 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/TCACL1641440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ff7c0b9543ab315278988084abdef37669f74b3392181fc3830f0db29470a5. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TCACL1641443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d65ab9593192976c2183a4799ff9d58a09f6c3195296ed67e30d82d8f17cac1. 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/TCACL1641444.
El Agua Limpia Todo (feat. Charlie Sierra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ad79b09bba5b3054650ad43b54d5aae4d72124180cfca603f2b2e99b8ad52f. 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/TCACL1641487.
El Rey del Timbal (feat. Edwin Clemente)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013073724014fb56d52acad508d737596a9568b19b50c7572e19eae1a34b19e4. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/TCACL1641491.