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 0x959ddadc8d9c9826ee7ec2b877867509945dfbceb0612de10aaf796b38bc51ce. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/173fe73e-5823-43cc-a667-215d6c2ebd24.json and https://artists.proofprofile.net/proofs/artist/173fe73e-5823-43cc-a667-215d6c2ebd24.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 0xf6aab5677fb55774d00d4095d8c2a0a80ae9312c8871324b326a8e0bbe98a47f. 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/SE5BW0200901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7338682ae4657103d97c75b9e84b1b1a4f1c78c9e5ef693edf322a186011db3c. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/SE5BW0200902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0652e2b23946e96c0a588e82023e51b6ba62325b624b64a1d7dd046aa1cb85. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SE5BW0200903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2054d3bdef6dae0e865967b494b2cf9e88b256735eaf8e629622e0bf091397f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SE5BW0200904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6de719e7437d8ef226f7025f87bc3655c9bc4babd90842b92b09ff2ad2989e. 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/SE5BW0200906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6ffaf9bc89c5336e58adbd843ef0b48bdb7a01a1ee18b1e81cf7f8deca6803. 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/SE5BW0200907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a87191adac86f7a47643ad5e894c63262139e590f287ebb5df99ab2b5572c7. 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/SE5BW0200909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7879f1dbfc648ac03a805a89095382425907f8b4940ec6e315b7dddab56b612. 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/SE5BW0200910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ff1a702f7cec8c07d5d67551dcfc725c6c188a7359a136da28ce6dc1494e5c. 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/SE5BW0200912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88b6dbd9f0a871b4422a7ed1410788353ca40d4f6fce0bf29ffedaa1009b391. 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/SE5BW0200913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2bc7e34b5adf6e5a1045bbebf3d45f8ac8cc26168d0c88001276011b52597a. 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/SE5BW0200914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f36b408e289389f7d1f3d884b586ec84088ca15c0c0fe139c29e648f22c15f. 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/SE5BW0200915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a7824e669f2b3a3abecc5f648eed1e34df0a3a5bd41f259482bdd787835f36. 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/SE5BW0200916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7133074dc5803e37714aa60030972a6e2e0429ef66a7c667f8177cfda37cf5. 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/SE5BW0200927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e62bd22199f004a0d9daf4c5db292f9da990a9c15fe2b0eb03bb45d08c36b7c. 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/SE5BW0200905.
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 0x013a3147dc47b61504db815a52bca71dde24b87604b9ab251a2c7feaf244cf08. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/SE5BW0200908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c6e1c2a0c89a4748727161e12da2585c3bc35e2120e6c619988fbad7fd999e. 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/SE5BW0200911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b612dfb38436c395cee9b3ead3ba9141366c9b61644d11fd55893cf927aabc. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/SE5BW0200917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3667548e8f375a4f21478de61981e3e84ca6079f2ef265184ca1dba0f4520c3. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/SE5BW0200921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a8bb4ba9908e449f171d54c3267b630fc430adb3a06702ee4c38324de49fe7. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/SE5BW0200926.