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 0x5a96eb5c542d24892f29f64eb0f0db9aa7ba4645f1a4785f4967664101b1af1a. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97165f71-fdfe-4353-872f-a4564a150a0e.json and https://artists.proofprofile.net/proofs/artist/97165f71-fdfe-4353-872f-a4564a150a0e.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 0x1ba4a3124d77f9cd705b8514af9937753384df24cf47d0188253d54130c3a85e. 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/BR1OC1500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679ed720e7fb91f1318f429d055308937a3231eb3ef4792736bd81ce7146e23d. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/BR1OC1500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ca1345b4e6036b84049f547fe5ce65a3910c6a66ce17f54c0eb396cc110e32. 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/BR10C1500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d89f4dd9dcd0839fa15f58796eae25f7f7593420fd85ef35f5d1073648747f8. 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/BR1OC1500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c81eec34873dfb1c230e13afb768705493a475f261f356fced7931516a4155. 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/BR1OC1500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80dfbbb62c92bd2818ae5f110f6e3d7aada24e6cce624c07cd63fce7be82e39. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BR1OC1500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0d78fae39f614b9734f5f1eb69c8785a46af920312849f1eeb9f584424c5e4. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BR1OC1500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064d15a20423ec82ff137808323d41b716f59c32d85b8c9f62087dac0e4dcaba. 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/BR10C1500028.
60 Anos do Pagode de Viola Caipira no Brasil
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730ba33f16e1b3712e6b34ddee575cd58d6a4c5eb618b563a444a6bd10a065f7. 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/BRRBM2001211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a62f9e1dbe44d354cbaf6ac497e44cbb3a4338a67b627624649d271d2f1d38d. 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/BRRBM2001213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899f46d6618ad2a3c60b5a791f8ca5b0b1a2b4951f7f741dba12eba18e316228. 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/BRRBM2001230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d03861b516ecd07996a644a4a00b60847d70c8fcfa11b26e1acfd7256e187f. 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/BRRBM2001231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce61edd2644430d90530821de91c777f4006f6d86e8f3b35dd9a413860918e8. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BRRBM2001217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8466c3c55ef63abd6bb45b73c2c9de8c35774cecb6c8d854c347cd3e1ea33cde. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/BRRBM2001235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd56dbe571c0c7f465ca1544d12fdd4fae6ab67aecd3fa31b8240f1f33859da6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BRRBM2001237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0412b78f4110be84b706ee159f5409b7030dd057cd798fefaa891296d4e0bb. 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/BRRBM2001221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49560c15735fa613a85c839778c7b4db905594e5a28091cb79a9e61da79219b. 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/BRRBM2001239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe53981f8aa53ead6233bff191e716e1b48f92d9158916c7655503e4e6b44a8e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FR96X1818569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524cab9e42085325aca0f35184e433d2052054490a5af950e471f122949f626f. 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/FR96X1818570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f7cb90be62038ee0b87add132e83bf047741f5f55fdae3552d1088b6ddb430. 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/FR96X1818572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb121212390e823191d613fa626192ca5844ea2445af2d02de3584468cf08247a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BXP1A1700306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc216fdbf2b2a3984b5a518d9fac61be7f476c00b6212af35f828cb37a59948e6. 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/BXP1A1700307.