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 0x970697d34d0ec99e8dc1fbb89e963d465a08c6abaff6073e6e562f57cd4d6713. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8593607d-d8c4-4cd4-90d4-382a9bf34ffa.json and https://artists.proofprofile.net/proofs/artist/8593607d-d8c4-4cd4-90d4-382a9bf34ffa.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 0x9c07eab47a677d1ba2a70a2297bd082e5ae4c3695ec529c735cfdd6dc53259c2. 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/USCGH1535969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c940703df8e4555e97378a8740951103a0fb81897d325e518af91b312c79ec. 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/USCGH1535980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba94a3cbbee8f2f79aaf913c365dd1af32b94fb9281d77c34dee34c01d3d60d. 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/US28W0410036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf58fb08d6f4707a1b5169de6b56c7f1825f8a851304358030be5d4753d83ed7. 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/US28W0410037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569ecd9be4f371a660b6b049aabe6525e858824e8f71827a3a4cd5a1de94a90b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:38:39Z), 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/US28W0410038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5f95fabfd4c2e68ab1af69b47e903fa799f75b89aa0c0b940758dc084219d8. 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/US28W0410039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3548d64231a9a953c75db4d5264a5f14da6bde1f58b1fa19361afe2378ec194. 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/US28W0410040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6263eda9727ef4849938e83f6d9bae14eb09fc46c628afbabc92ef577d5b42c5. 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/US28W0410041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158f8a8df3d742303c8296129621eb193b4a72fbc5f9357cbf39ae8c1b86712f. 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/US28W0410042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963df5161e6417020bfec752dabbad1a3e7c8a7093a5c94f450de3171774d4b0. 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/US28W0410043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ba536a461fbf8bae821a5128f4c2897152cae9fc8c2ef713f9804d2abff2e7. 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/US28W0410044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f7b0397924f869f28ce57eb16a1ae727613ae808bd97caebd0c0862c8c5f7f. 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/US28W0410046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230542b6bc347e121073f93426fd39799ba15345f0adbd69cd3c62fae30924f9. 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/US28W0410047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d6b0f7adb874ec5e5766fc0680166f82dff892b93587199e8951b8e86238d5. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/US28W0410048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75394b032e6d877c28a92fd7fe4ce099b220378527ac62d4414accae31ceebf. 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/US28W0410055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93066fdd8505f36f5f4cbeb97595ea5962c8f9f45ae3a3f4ee352e020fb8dbe9. 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/US28W0410057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48250746c99f57c0247bb8ece96c533f3ecb54477bbb111cab75300547e4126. 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/US28W0410058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eec51e048df0e6e62558d29fe41b05c1ab3da52833f6bb9748ab7106b779050. 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/US28W0410060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26361c71c74e8424a43aa71ec38a5c445d653f29726a5646a4bbbaba721b5be4. 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/US28W0410063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfc163aa83c0ca118a2c691818c02d8865d8ccb8868fedb21091cc901fddc75. 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/US28W0410066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359e34b321e7a13b98b37fe20e59c1aaed2752658b5cf914d92c7416460e9ceb. 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/US28W0410045.
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 0xa4eae17a7801c6afaed14b1b5df061cf5d894419b8394c9695799103f3385408. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/US28W0410049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05aac1b08941400f7aa0cd31ffa620de47966ae084c24e7a7ac64792470d9b1. 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/US28W0410050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143e5fb815c596cf5dd4ac8ad31ebaf6294d1f13e0713ba56630037242f043e3. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/US28W0410051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c8e0fdd2ed8cf7ae2ab0dbb81289fe8ebdee24ffaa09172dc9b067e859bcb9. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/US28W0410052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ae1c1efd375a9bfe94a9bf3a7fa73188692f2965f3eebfc6e751a0c228dfa8. 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/US28W0410053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615d9c2362d690dc64dc109aa893a951ef061ad6c881038cb8794cb3850d018f. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/US28W0410054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738f3d6e8934ab5fa47f1e0457373b4dfc5669c59bbe508dfdf30fab5e883bf7. 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/US28W0410056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9221511be94d1f11e4bf587369d6a36d40ee06b9b688c45102279d880e5db1. 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/US28W0410059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c06becd42d3159f9d1021867d673b5e872be6882a4ab0d9b30aa4d39dd579e. 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/US28W0410061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6354935821956ae0229101f546b33899b81e941884ff4a1dd4640741967f54b. 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/US28W0410062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03a64bedfce9f705c79a1e88437b16f69f26f5d5454cd95aa1af7385c18708a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US28W0410064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52cb3adea0bcfa74316a0fae9403964184606ca80d2b6365cde0465f213f5f2. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US28W0410065.