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 0xb952ae1484d4c36481f3d256608435ea1d43218ee59e97ca6c6a09046644a557. 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/99bf1f9b-c387-46d0-b5c8-87e0aa297165.json and https://artists.proofprofile.net/proofs/artist/99bf1f9b-c387-46d0-b5c8-87e0aa297165.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 0xa35d6f1f7ab67e8d45048edeab3bba391d03ae45eb0c3bd62bc192420debd1d3. 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/BX08N2200428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0336afb3ed1efd07ec6bf5e0de8d9f7ab272acc281e8a8aa9d4ee6fc8091d8e5. 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/BX08N2200430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382495ef113a8ce34936cefe6f89343f0664667f042dfef8cbbe63f40c539f89. 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/BX08N2200432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb26d7063f2cbd8ee9b0ad83464903dca02cf2c1662dd53a72447bce3f0107ca. 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/BX08N2200424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2868f60a14272b20fc01a440737c1ad5004c4b56c0c62a5388eadff4ed7d6c4. 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/BX08N2200434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f7fa2d12be13f75b6d942cbdac4b783ba2ae7920685f79f8cfe86cf93f5c70. 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/BX08N2200436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a680212219499d7750174b2d82fb4c9258d8995fa45ddac7af5277542aefe2c. 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/BX08N2200438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef41d39badc046da2a15915c142f00b6d5ad4832c3902cacd716f7cb0ab1714. 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/BX08N2200440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b5c1370875fa867b0ee8913b5460f3f35ea241a66a99002ea068034cfc855a. 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/BK12L2400002.
De Tanto Te Querer / Caça e Caçador / Pintura Íntima
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeaa5c5684e8742a30b12d4cc97ee2c58aed3688545de21767ea0225236bdebe. 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/BK12L2400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43730cf0c4a615a328c8ba529d72c121f05d336bf20f5fe0d4bf934ab5f81aa4. 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/BK12L2400001.
Recaídas / O Amor e o Poder / Muda de Vida
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeaa5c5684e8742a30b12d4cc97ee2c58aed3688545de21767ea0225236bdebe. 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/BK12L2400201.
Carol Valentim: Acústico Imaginar Sertanejo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9b66864a4cdd06aa8d2bcfb836d4a53fb4c7ffa42abae0c93d8f47baefee9f. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/BX8ME2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3cf982f9acdc5ac6156043e3eededf2a8352f4e673e853673ddcea3ab59b5a. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/BX8ME2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc22f5fa4e2b4411849abce09200421b3d093021e8bb60aab1da54cfb05513c. 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/BKFA52300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2868f60a14272b20fc01a440737c1ad5004c4b56c0c62a5388eadff4ed7d6c4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BX08N2200434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a0a01d1b6070809faa66842271129873a6189e984839aa5d80fa535e3becfb. 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/BC22R2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3adedc4f748d24315a6423c8dc66fcad8b458cb98590cd6a71df156d6d0ab0. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/BC22R2100001.