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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83564560448ccf8ee44d1123e1d13c2efa3d25a05155cee18035fe75b778161. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0c57bed-770a-4173-9fbb-3fdaa4e57ab2.json and https://artists.proofprofile.net/proofs/artist/c0c57bed-770a-4173-9fbb-3fdaa4e57ab2.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a57bfefbef62dcffb44c06e13d2a81e5b88a16ddfc21de2b21d3524252a26bf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES5299200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea47ea5b3ada958a6fd839b2032ec458a5d617b59a05f0b6a30c9c405037d4c. 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/ES5299200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb7da8a7cd6e4d64861e0f32514ffd3e86093e061deb48031468cf89811048b. 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/ES5299200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48af3f43574aede738b9aef00c3b9d04ec607ec217cd38f7c6976c433abefd4f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES5299200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2857ed87ae4b6e079beadaf81a558c366140bf2eda8ce1b3377ceccaee2013e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES5299200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb28f4960f6e9201643655499c3a481430f9ba0c32a5d7ad3b72c591a8fbb3e. 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/ES5299200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c22ae3da300de897bb5cb9dcb1b4ec4d634d7b4ae3112c3c5074f56bcc99866. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES5299200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69de832617480f8dba0fe837dd4b0a85e224b10975ce62d5488e1fc12ff10b56. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES5299200055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701c05bd054f228b95cf7dddc9e025285bb5a6dcba77fd16ddc6b8195649f894. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES5299200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d58aca8e232f4dc70deea5444a55f3cf9ed3b6d820ca87481477df7d284e4b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES7580500640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73020d18cedc2df8be91f122f9114ad2540a40b2e0258ed27676f4662b0d35a8. 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/ES7580501648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf49340af55f4a7e07f7a896cce78f036d13887e93138e7b2eacaa5fa67856be. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES5378900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd8fd88772060d5825d56cef6ad72aefa27884d11631e5866cbddf3ae299c39. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES7581110260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe874bbff2d6580bdee8ee10ebedd4fcebe8a3f2ef72e61521c8c21a6b786917. 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/ES7580501634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388ec2d5b12a353ebed8da79264366a6eee26873322c2f6ceae3813dcc37ea8e. 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/ES5299200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7c97e65e8e7817a6d6d74478461ba75d2f941d754e925208cb351801d79a93. 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/ES7580500715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd435a249e54c2e118488750d48c465bbdfcb81223c6997a6478904e5cd7888. 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/ES7580502268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e0e8c3f7e718a40c9dfc48e71421505fa8c95b3327fe6dd5a90fa97e004e0c. 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/ES5299200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61b6ac15d208ed46b80aeb24dc8d5eb0f2145b0cda1363e12cbf424b59d1a29. 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/ES7581301056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c8f5ea90ee243b971caaa622e435d04e970beed17829d13519b71c14876ee6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES7580501338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129cc2edb3432111c505d30cd5d104d6cb34fb385e1bf14f234572f02e0d3aed. 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/ES7580501270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8515326df2ec86098824041ee89d573ca2bb0daa350d3bc5fbb304f2aa039b. 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/ES7580501135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4420255ce4763d587b6aa8c9743ed7078fd9fd6dbfd01ac605dfb21a7b44c4. 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/ES7580500722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb28f4960f6e9201643655499c3a481430f9ba0c32a5d7ad3b72c591a8fbb3e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES5299200049.