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 0x8c378bd0b9d8f36c14f84e34d8b6f595fa9ccd94e32d1aca8fb42c7516db3480. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4f6ddbd-0e8c-485e-9f3e-1e2d8095ade7.json and https://artists.proofprofile.net/proofs/artist/d4f6ddbd-0e8c-485e-9f3e-1e2d8095ade7.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 0x8535c5cd22d2dfbc9c8d5f8e7b97859b738bdb632092bb11e2c0644abac78d67. 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/DEZC62345343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264e25e93d3b8a588ddd205f8b03f3e4e4a5ea84659b2fe48fbded47043a59a5. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEZC62345345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5020d3e22f3274252ea8a3a3b262ea4863f3cef260856da8fa5686466e50cad. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DELJ81958633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe411c6325b10b81d2eb77de5eaf35ef2d85c505738234e698b0366cadeebda0e. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEZC62335332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca33ddd9077459e63dedc3fe1acabe0b9ad11556af860005e9da6c4957948492. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/DEZC62335333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0b32bb731fe6fffd43a4b74d11ec120746f4831baa34e9470a54210aa48b60. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEZC62335334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57a250f04aaa32752c056b6ce85bd1844943f2beadb6e4e1eaf27017fb44b7a. 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/DEZC62335335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe954d681126c3dcc7852ba9fd8132ae05a8ccc7e87d7cb959e983aa5433ec5af. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEZC62248629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d1c38c517faa05273a715d22f8417ab9f9bf5a3dd953830e6d8482579d2517. 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/DEZC62122806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b349bc6648e0492887864fce833458bf4af01e539a37378913ec6b78aaf679f. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DEZC62335338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd889b46f53d29e3ccacfed145a8a81c4805995e0760b311cf550c26b277c0902. 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/DEZC62335339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaade5fe6b40e0225b04794b52882a8f77cc790e1dd74fe4ab334c9e96f1722fc. 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/DEZC62335340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d85984f2fbf92644814c4c7d9ba4163fa4e296e6f36b8dfad9ced1fc2a7859. 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/DEZC62335341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6697fe5224ed6d8374285e8353ccdbb1584fdd0b28f9c268df575c064370da0b. 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/GBLPF6773822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1baed41222c6ddaf7c8f8570a12888a9c8406166fe41a15cba2ec340924178. 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/GBLPF6773366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff698c037a06b5f992d1994a222ea4b343fc3900be01f489192e9a5df01a8ba0. 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/GBLPF6773823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52520a577bcb5408476b5a20484cc84e2e1821fd73f4cc4c545ebe2046b5a573. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBLPF6773820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e395c459eb5ca2898858f437df37605bb40eb0406886840fc6a99da989e0f8b. 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/GBLPF6773824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644c1639af5dc4c9c1dd8e293689580a61232a45181b37b8336cbe94f5349c3e. 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/GBLPF6773825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11dd85f92344d88def9102cff3a1f84da2145e07bcaaebda395c49b0be5cd681. 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/DELJ81951121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbd1af6aa12813064b597212630be4dec698ad3b40df9fc7591c1803512325f. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DELJ81817366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e3626a5c409f8e8caca8cc01d92db33e43df3d69f46cc1b859e70a699e6323. 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/DELJ81817373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ffd6c934827a5a2ba87395f7aea3ae8c507e72d84c34540a87a643e2d97351. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DELJ81822417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06c6f5725704fa1949873f83272593b1ac2b6bec803447249830952b6bb2144. 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/DELJ81822418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42878e591358eabb26fe14722073624549c2ebeb6b46e6fd81560e86e6ccae7. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/DELJ81822419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b78a9630215607d04e2a47c3313013bcbfac6b6137b76a6ea17a86af1ff6bf. 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/DELJ81822422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6410f2e9330c9510e872b29291e94ef80c1fd268c9ba2c9de76558d23731a7f0. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DELJ81808190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d29e6b675ed45574e822ec84a02f77f5958ba20aeea03af8eaee0be17176c2. 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/DELJ81808193.