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 0xe10a022ca62096b00900d6d61da526f058ed376bed339b5bf7b90d7ca78bf747. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/834f3b50-d74f-40fd-b652-3f3bf7837c06.json and https://artists.proofprofile.net/proofs/artist/834f3b50-d74f-40fd-b652-3f3bf7837c06.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 0x7332ecf8140c3428d64d46ba416364b54f18f1c49659dec14ffcb286199c2a3a. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/USL4Q2579183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3a7a22c7dfa6e628e4f266b76c6970032404ab71dfe1fd0548a098c4bab07c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USL4Q2579184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc7c5fbc61d4bf61192fdf19a0ba77177f05dc4dcd9a246fa56d404e57e0bd4. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USL4Q2579185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f38be04c4947f1f9ad06b095b054ac6cb69a6b6c9295925cb787ece89e6cb0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USL4Q2579186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe056e5b323536c7eecd36c21481f9e3818e69889e8bf49e3b513d91ff7a381ac. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USL4Q2579187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b68111fd4a2df4292c7c09cee8e4312dac6ec6f12c67c6ef90d2ed5cda0b60. 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/USL4Q2579188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3096d3a3129f4a6e9bca0582996227b7c28974dc0622390da6cf6c0c604ae05. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USL4Q2579189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c451b96bca9c3b2dc0435a67d35a0bde77551f01636397b5f100a1c9698a2a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USL4Q2579190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509a1c50174aaa74788f756a35eb2d9a0e29f53d11ec53875127dcb93b019733. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USL4Q2579191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1190ecbf34cb36ecf7d20437b60afa71cccba208f7a901f7c06ff6587cd48375. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USL4Q2579192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099db83354e48a4b9948d2bad988294902f2477645e5ec434090ec16ff6a058c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ7N2511262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff949adb6e1619a9c61f861a966d98744b6d06e85c038e2bcdb56fc1e8cc089. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ7N2511263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1efcefa1e30b33186eda803c89cb7192d4534f63fa41338389069d1382452d. 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/QZZ7N2511265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863b18458f8c583cd80e30c543793bc1dff56c86b1cc0917ecbd0328381269d4. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZZ7N2511266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e89dcf2ee5280b6bff790f33e24ce82b2a51e34bb96102dce718a5f3a222dab. 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/QZZ7N2511267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d40af7a6f21be4523469ee3fdca431cf6d5c1fccbb77a937888b826e28e452c. 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/QZZ7N2511268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5180802855b3af08ce1f244b529df7970f576d56588fd7ea4dd8c687abd23a54. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/USL4R2531570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85aa6822e6bb4b6f77f358a9d89536593d1273686bc846e0ecadfe6c86515ce5. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USL4R2531573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7203dd9533cc5b490a746352ecfaa0080fda129f10f4e25ae76020c197e70a. 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/QZZ7S2587013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e9f0a891a288233d8c093111df23987345aca0a72ec49127bca8796456850e. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZZ7S2587015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5751e1908b0bda644823314caf1c832ed0baeb2cc66b783334f64341f6762e51. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZZ7S2587016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d8300ff273ccbc28648c37e070d7654d5f62a963f807b4f3b5e6f850b4f4d5. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZZ7S2587017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0796904428964ad034d90e5a55164cf522c860c338eeaf8d21462e6569570e. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZZ7S2587019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf6f66fa5518b4f67657d53f588ec45794c4255cdd3b0535fb760619e5315f0. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZZ7S2587020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cb510aa06a4932fe8d0eeeb7075be55794f4589a11fab08bab028dac69f984. 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/QZZ7S2587021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f592081b561159860b200047704d721be9b87885b4b43db159afed48500d828. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/QZZ7S2587022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58a3c53c4a1cc2a67c2263ad8dbe0d48a43c89a7ffc27951c801e3da6ea0ac6. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZZ7W2533093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35cdfe29c5aead4ce39de31ba6df4fc7332b1b16741934e8816ed0fa2509494. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZZ7W2533094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc61ad7f7314b0c502cc2b56f670a507b54623b54759d5cf32124f95a7eb1bdd. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZZ7W2533097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b49ed23419ee99f5ac00df4d76006e3afec738f3cfaf69ddfdb38dc0401194e. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZZ7W2533098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f503c2170646eddb9032d0e0ea55e762bce65cf7b0d2191bd7256dc6073b0a3. 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/QZZ7W2533099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d131f67e989c82fe84832955885f557f32959dd0772c16decab2cc4be5e1ba. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZ7W2533100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8c628e3ece56f2a2dacf10a86cd37e65fe705d9efdcb546d115e5a1826f45d. 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/QZZ7W2533101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5efd15eef3db16a3c94bc40ee7529d665def9d4d8b4894b76933799a5a95424. 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/QZZ7W2533105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9756e6de8396040207c33c723b9c92109469c902b38bc65392db02d57668942d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZZ7W2533106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929475a8c754bb384ea7cdbdb8facf325691a3a1a404c5be4f2dcb6d97a658c2. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZZ7W2533107.