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 0xe3df70c59ec153d6d0c2057fa3a393f8bbfd73eef49026f8ccbb3af70f906249. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b004154d-22f0-4982-b74f-c4014b985beb.json and https://artists.proofprofile.net/proofs/artist/b004154d-22f0-4982-b74f-c4014b985beb.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 0x07f25fe379d8c549f3d462a5902c4630ada2042222ad623864d2ebb60ef28119. 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/DEAR42478647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d8fa7fbc4fbc0e15198ae5a62239288f4838bd211b93308f22633c7f382864. 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/DEAR42478411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a18f84d349dd0db9e1220041fee20d0d81c23573f568bf968c409288262663. 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/DEAR42366857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c913a5040ea50b523da9433ad61878c61df9329de9d98167f954013b155782b. 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/DEAR42396873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492a57ac60d41d651d95b7d9cac18b777e6444d3aaa153e87ab6eb86bd55559d. 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/DEAR42309227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f85f08a6adaebda20977ea7366abb7787a4fe945c27e667595657ac636e7e4. 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/SE5BU2210056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93346deeac89cbfc9447a4b1aca39fb56cdc0f5e492f5c31bf32bfade4d7dd57. 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/SE6XX2266478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769d7a2be25304ff4d4f891f0b7f28e56e9e99b033ac00957ae9ddcd3bd1e061. 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/SE5752260672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58771e08eb39674d692bb3083b45b137beab0a34a38566a895cae18fb1ef237. 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/SE6XY2107125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2f1fb579b2339f9399a57541da7fe3fa180bf3c4000fa40dee51a4856c2579. 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/GBKQU2281709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb3d7e3b2c29bf8a87cfc848355db329157d39b6948d356f8bbe12db94f3719. 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/GBKQU2281721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d48ee1d7a1d2ad383d635a477c97e1799348f0198cb9f5da45255042eb97557. 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/DE1JN2363627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58296c08a101eddc6d54fb2ed1c6c68ba66eb8c67092cce5fd6d23c0203a7a8. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DE1JN2363464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb622aa0003968d5d4a6776455d1ca0ecfdf1b240d7820f675ed91cc2ca91ddde. 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/QZTRX2581768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6b3b199e1a25db29b0159c79f23a7058e76b543ef464338922c870214fa29f. 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/QZ5FN2521916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb879f963b0e7085d525dc59f706f9f336de4fb13b8ebadefacc638added7e73a. 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/QM7282366190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076fb3777075184e054194516173407c905de49149feca104ea1fb272f2195b2. 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/QMDA62319754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acab81aa7b49d3867a7b90b499a733f160e9706e464d44ee2bb402900ca196e. 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/QMDA62320209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd377ee1cb2725434957c24a581af111f2aa95b21d72d8922fae0d4ca769d23. 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/QMDA62320227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237b917827da5013f350644ae839ec4b785327bb034fea3924b2c2fc3c715318. 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/QMDA62334840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329af190adf531e2b3a51f580417ad03099e2add2fb3da466cba3f0465396e27. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/QMDA62320233.