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 0xfbcb50d529bc53c0c2e780c80830b315bd2fc0346d18b62f1427e22da780b2b6. 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/7936b349-135e-4b10-be12-e3f17f570474.json and https://artists.proofprofile.net/proofs/artist/7936b349-135e-4b10-be12-e3f17f570474.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 0x657ba4cc3ef5143d307165c51be55953f2c9504280eeb9221bd2af06b66fda30. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/US7VG1437844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5019f60d0f2ea8f217a247390ea23abe38a5059aeea280385a0c95184d1a2814. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/US7VG1437846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ea459027b16baed3f86929a79b33e6ce54ad3def60a888cbc186e96e083daa. 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/US7VG1437847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4bb9433e5a0d49172c2a232b8a7be8258583cf744080f956f641f4528dadf0. 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/QZ5AB2058402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb293f49212aeebd0dac980c19c854a531da5a80985f27768cc0f8a433bf20a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZ5AB2058403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fd9812c12629f227213a11448a3a9941d0b261743de3f221dad11f3700ef49. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZ5AB2058404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66810bacd9454919dd477ec64eea27e5f038ac13026b4149b8db27878ba2e16. 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/QZ5AB2058407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068a1f9201c9b30a32e693f91b622721d64efaaa7c2ae102111190699e1aa87f. 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/QZ5AB2058408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf64211b3c5ffa9360b848006d2072d2c48f2f0ed9555bc8fa3a81dcc5e6e8d9. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QZ5AB2058413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad98b376ac8ca656b5ac0f9962ad4b2bdf3d996f337a95f3739f5760ad0c5782. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZHZ31902922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4a16ea50d06f169f58354ff558326bce633ff6500c3007f988d3638a97d0fb. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZHZ31902923.
Vem pro Cabaré na Pegada da Polenta (Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00706bc6fd9c436caea88b0ffd8d312e05b3090893dda79e7f7c5b039f9c209f. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZEQU2253011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94be67275748e1a51d9f7a1351c8b408020194a79fe3292bef2252dd9ac078b0. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZEQU2253012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff97469ff772a1494d9bba8b3f25a33fa428e199f8bac55e630627cd155fec2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZEQU2253013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874aca1b1edcad62eca0a21ec5a850e1b26c8ccc313495360963ab74be6c04f3. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZEQU2253016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9d9861ad56b1054afd95cfe86d7e61e0c608e37c4e3fa027b64775cc41880b. 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/QZEQU2253017.
Polentinha Ao Vivo no Carnaval de Paratinga-Ba 2024
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0400c79253953b16a540f8cb3d377dac28c71d25c758af5489f4286fd83440. 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/QZNJZ2488047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b192601c3c5381807d32ffcc5ad0af04f3a9c28062fa1cadd35172de39e4a2. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZTVM2562928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9cd7467e02e27d2a1c49ad4651cfc15950f8f44e19970f16d28fcaf4903e48. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZW9K2506762.