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 0xfd825fff4c95822982070af046db7dea00b1522f6cd9a24759a34fbdc55cf3d2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0993a4d-4e8b-4543-a1f4-090a7f69b239.json and https://artists.proofprofile.net/proofs/artist/e0993a4d-4e8b-4543-a1f4-090a7f69b239.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 0x01ea95c0dc1d49f78a8deb7e0acaf9c241d2d7bb707fd599ff975280e357010e. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/PLUM72000657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc5f0cbc9fdee91c272b7b04b343baf092393ed976681bf5442a8310a2f767f. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/PLUM72100183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ea95c0dc1d49f78a8deb7e0acaf9c241d2d7bb707fd599ff975280e357010e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/PLUM72000657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262592adf8267c6d40f0835866e4fa92f383c6764a703d57b4c2d9de80666daf. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/PLUM71900511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5a85e2bff7e644ce3dced68d1e9274ea24a3b83b96e93d52bdb8b38220c85a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PLUM72100351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597eaa7ce472f34553cac60d5dacee13dc305987176728175bc20e986b9c5cd5. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/PLUM72100352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356a75e4f1f4de1215e15fa6827942d7db36dc8061b25c03fb4c600193a21a78. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PLUM72000684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6525b88a87898cdd97402cf1896fd1d4dd239803a613eb9b6abe1872420cb2ca. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/PLUM72100723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c03ce89d8371ad15ade739cce92d4604169795a3a15485ec94c8fa7d647890. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/PLUM72201035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3595a7710c8017857e724963b62f8e74493d27a766cb3cd6fad3b0fabc307d8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PLUM72201063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e78e2adc67ad7cbbb49f3217e0c69017121494c91d77709f5b42ba6671f500. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PLUM72300533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba5615f3b176b2848ac2062d451dbc10c669db15d904befefa887036ac0a479. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PLUM72300532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c65831a6b8c4d895d7e797d0e74e3b2df93a67ea771420e271d335ef87b7cb2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLUM72300192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfa8756dc49455c3585670c624f09e4f3e33942e6fa8128f2aaeb5717a77e24. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLUM72300343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502613152e53c1fb8206966fdf6aa7a380dcf566de15e590c3d05aeeebf94b7a. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/PLUM72300531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbc57f788a74b9471d893986a38a8fdeffb5c4fe4c24e989a22071f812027f0. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/PLUM72300424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c8a78a2bb4a077b728809c92923b11aa446461694ea01857ba407be4843695. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/PLUM72300344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6f9befdaa9a0dc23e048e8e36b1879510ba5002b611121f2e9a497397bca44. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/PLUM72300193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b120594fb1040250413630c8415a86c75ebe3da71c11b152d5e9f3b277f61e. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/PLUM72200491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1356a1f216f7181307027e0c452d6566ad3f81f0884d02ff593421c97912dcfe. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PLUM72400411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f062acf8c452e1d544bc0fef5ad2e3aa548e5486457e36ffdf528b963b43862. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/PLUM72500182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7a510d0e5fa47216ef0420b81395b10d5289a5ecf6bd479ca4513a45d1c8fc. 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/PLUM72000721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5f74895cefa1e3b52ba51620a3115356a0d1d4fa2403a375d1510deefd1690. 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/PLUM72100084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a025897262e096433492a1bba24f2da10458ed5534559d713a9631ceccabc90. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PLUM72100092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd117012075abc2af265615da902175b7e917cad5ceba9f01160c18c2e55eb0a4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PL22G2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fa4b0dab32fa37033340b690dacb06a08c34af7411ce2149f322ca06fffe40. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLUM72000344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b46c85407fbd1faa7287e24e3842c2b09b78ea35db3eeba9fadc6b6d3d1eb0. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/PLUM71801188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eee5b8dae429a47709d1537a944904590413391147605ee929789ee9a3ba82e. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/PLA552100252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370b03e719dbe6f8671a8a03bdf65620ca6323f77ef8de23ff6d038660cdc76e. 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/PLUM72100432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a025897262e096433492a1bba24f2da10458ed5534559d713a9631ceccabc90. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/PLUM72100092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319c355cfff8e4cc44149d4bdc24109eb1bb5f8f45536f02d0395be58181391c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/PLUM72000430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b120594fb1040250413630c8415a86c75ebe3da71c11b152d5e9f3b277f61e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/PLUM72200491.