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 0x033980ae0f4f46462b890ead925839bc7b2d0fc2fd7a676537df5620c549c2ed. 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/00331eed-37f9-4eb6-b5e7-2426c10b82b0.json and https://artists.proofprofile.net/proofs/artist/00331eed-37f9-4eb6-b5e7-2426c10b82b0.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 0xc93aa5d217daf8d1214a7d3e9a82abcfa4c47535bb6c42ab2bad493e2d28de55. 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/QZGLM1966448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002a3241b4320533489be3c0813f3273625039f37232549fb361473901579056. 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/QZGLM1966450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152fe4c2856a8b698b8ec9fc65906927c55934f6cb6dab0a534eb6da3e379fe5. 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/QZGLM1966453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3d91d4c5c74ed12cc3921f8158789d6480bd130990d724ae2ed642c16dccf3. 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/QZGLM1966456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34313546df7e802951fe2703c0c5fb331b35673912c32ff6ae32b3eeca4db0b7. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/QZES82012103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9faf0162d3a920723986df8bf26adb99ba658ecb8fe485f2ee6d83ceb9ecd1d4. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHNC2006110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19255911dfcf994a2a6fca66303feb82ae3b32f2315124d092fafc893b776c8. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZDQH1911887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54111922b147a839a11a6fe566763c7dfa2016f9ee6e6137269c5c23449d2b7. 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/QZDQH2161407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d318dcaceaf9588a45c818bae7be682b3a36f6eecf8bf9b5fa7a5870e7d3c2b. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZDQH2161411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f15b7a9cca26e1df52fdde3e0da6d5fb6c7decd6256deddc8befad83583dcf. 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/QZDQH2253035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58117230284bdaed923eb90b0a9b251ae37bf74725c29e997837d5e2e4d9b06. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZDQH2253037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6153b69911135fd10161b2d08e28902dfcd8a764e70b756f8fe8be094dce8ba6. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/BK4DA2302534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde09278609354072e086e40d8cd8c710fb5513036d3eced659319b96b410378a. 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/BK4DA2302537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31287a5a63144c66e17636dceaee04b61bdafda33b3fa1f332bfdf5e36cfeef. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/BK4DA2302532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed05bdd46e8b6086cfe03768f310609eeed15209da0228fc355115b682c2111. 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/BK4DA2302533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6153b69911135fd10161b2d08e28902dfcd8a764e70b756f8fe8be094dce8ba6. 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/BK4DA2302534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db2f5837a69b9361f96bd9b1a29cfa5ea36d625d6b7be78631322816f5195d0. 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/BK4DA2302535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc315220eac490b6176809985f7470f739c1287e74048f545834c1a83fa4ad3db. 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/BK4DA2302536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46485e42974d517fa9018383db1c3334a26f94fbc42fc03c223a6b3046f7fdf2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM3DF2286917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ce046477afc6583f01a8be9ec1d622b8f9a165ab4078f1e1e6313b9e25db02. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US3DF2415135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7bb637e2e0184ad8be836a9d625c41240608b47098c6fd1632199c001cbabf. 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/MXF012300752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d32a2cd18c4fc6114740e8620b800da14a752324e39a43591eaee7ae3a17240. 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/US3DF2260542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47118c0a1b2c2832f1253dadbd53c3c7a810d7f5f570ec93dfc249f88702cda0. 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/USANG2243713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99afd291a17ee944b272eb7d28b80036fe9fb15d0f3e07c240cbed786ce0c90f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZQMB2105735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d897851183b3826c771302ab9daa8efbe224b689efa47fce52a46a56220b99a. 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/USANG2475685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47118c0a1b2c2832f1253dadbd53c3c7a810d7f5f570ec93dfc249f88702cda0. 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/USANG2243713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2a35a812ddf77f22100d73d774f12a4201468f5f9e464b0983cf9945ea8d76. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZDQH2422005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfce6fa88e8cbc6d207ad9e11ad5c6d18e10ddae39ab37a661e081e097a65940. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZQMB2108446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749280b7aee4cf4c50da6b6a7c83d74e7a966a1c053b8a9f11856e5ec7721df3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZQMB2105737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd416fd4e780d73be5b95761a5216fc65cfb0e8365e5a328cefe347ef579d0bb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0H2410564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9b8d908307bafdf3faef35dd9e721ca69a164ab7bfad76eff320081e9dd5f3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZQMB2106342.