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 0x933aa00dfbf1c6e08c16a05ed376857d65f05ef9434816e0b9ce1779075ec0fd. 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/b1b88950-17f7-466b-9d5c-5fc3247818a3.json and https://artists.proofprofile.net/proofs/artist/b1b88950-17f7-466b-9d5c-5fc3247818a3.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 0x0cdd281409232c64ce4ad066145daaf5cd38c7886f5cebb7528ff9057eb74153. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:24:51Z), 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/TCADM1822582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75856a058f8119c097f3c4a8235748b56aca9299faa27a85a3a49f7462d7f0d. 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/TCACU1676919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf998987547784e13797c25e1a89d945177aa95a3463f70d623ac580eba063290. 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/TCACU1676920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482ee7c566ee1d025c6b4960a5997b7c5e2935498f090da859f0792d59ea510d. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:50:17Z), 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/TCACU1676922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c185a9cd15ad29d87078a492785a03aab33572ee05229c4fbbe3a435fd25f4. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCACU1676925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fcec9e4eea3529855cc5d65648b99bab4cf893f2d3c4e3c586f2e96ef73900. 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/TCACU1676926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af984e918a7f122d4db537211e8b3bf6dbfcb1ab15217e0c5fa5dd0cfa925b5. 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/TCACU1676927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06ac35f51348e2a13ed7f64153810d5502bf8d8fe57f76b9db8eeda43399072. 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/TCACU1676929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e200d75177260508df9ab2b58fda557cfc2c60be26f072c8bfdc67f87700b2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCACU1676934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395ac36728a26b1433e49880c9d8f337cb8609499a08768b54217dcd37db6dd3. 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/TCACU1676937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20eafda08af609fc2cc57fb5aef3489f541be8e5ecd9dcf9e23c6981e927decf. 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/TCACU1676940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b617378bde50397b9358d290f6c16fa0841c971f6d907929404143d0303115. 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/TCACU1676942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542d441d610b468ffb8f0827c6c1e51edbdbd3b656a07c95cc5cb93c16f5f88a. 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/TCADM1800852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6932d72172d960f975f7fc27617b2c71a5e6d874dc5c5a01a43dca9249247b. 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/TCADM1800853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed14a5fd6d33731384e107d3d073d34d75d11d45f1a132d454e5f831be804268. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TCADM1800854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440642959620a4bedb64870d000c42b3e21302badfb187fdb7c9deadf282f5df. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QMFME2224138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d3354f46e5334924a3396b1865ab833dae89fffad9e4201544b367189c0479. 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/ES16E1900043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2407d6e956414a87fc454d7110c4158e04454b8a5b2f374b44bb7d0cda316094. 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/ES16E1900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1426515de080465b065d1d330b90ab722d9896c7562c266dd55c1ea1809c854. 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/ES16E1900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf68ce3e26b973e96e51ccdc8f2ac7e48763d483f32812cea8ea37a12d3bbb4. 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/ES16E1900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a8885a8c28a2f52372fbab91be81ebda2cd60bae8f1cb3a765dc57dc30cf5a. 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/ES16E1900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd7944efd909c5d7f778fa0cd4cd62b026575bdf366aead87296716a00e8b9a. 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/ES16E1900049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c5b6ae5d381507607f1ad6552fc971672ec44eb2e768f2fb7134bb635d0938. 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/ES16E1900050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0092f23a745c4c58c73d36c64dafb6f8980b5d5778ffeff846c77cfc93eb692b. 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/ES16E1900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e99f4e8e09945ae7dced1f8be3b5c4777b4667aab2390f9d5264b5bd9ef3c13. 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/ES16E1900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bf5da8cf434fbefc283a2bc53e67043d4f12e2ca346c82784e6faafc7fd0d7. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/ES16E1900053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bed9f49deac2a848e1af5fcf62c4282e8b7a4500bf96df980ec31e2fd90618c. 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/ES16E1900054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b81cf511c567b765eb5a4c429e341537e06a1e0c036481c69d737ae0521a61. 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/ES16E1900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555907fd1048a2d26ec00f0a5ba3818a95ecc705e80c3e7859962d2b9caf17c3. 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/ES16E1900056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fc2095d86bd18f4b0cfbd1c1f8645e14e8ce54639e496d5939f378308ccdd5. 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/ES16E2300583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569e56b58dc30ae6f4a460697cc5c61763d55e468b388afb3d47769d15cc1bd9. 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/ES16E2300585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8df1e9da42dd6fc607194b20174f87936e49345597a61177060eb4b51dd37a. 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/ES16E2300588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63490c0afb4690fd4bf54090818f75c84b7040369696679e525ca73c1bb7c4d0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES16E2300589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42016c119148798b7a042077017e528001571cc990fabf964815d7a33216f976. 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/ES16E2300591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fce2b39d46485a4e15dc4fad62c0997968b7c36bc0244a40a5544bf999afd4. 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/ES16E2300592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6ca4e959f592eb255fa74f508baa9c243badf6a9f62e495c1f50e01dfdce3a. 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/ES16E2300594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b3aa275822b4233b36adfa73cfe7eb1cfd9d52331b4e249951579133fac206. 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/ES16E2400703.