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 0x6be66987327b67854a39670d58b3bbc5a9a23ba27c423de0425e5c5e14a36728. 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/b86109d2-4432-4ee2-8d6a-e48389fc14bc.json and https://artists.proofprofile.net/proofs/artist/b86109d2-4432-4ee2-8d6a-e48389fc14bc.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 0x578bd7e850f740c34d22939015c89b4bc8e4ec3f7d64933f1fc400f52a179563. 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/TCAFE2011401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde67188cb78da352f6e7a3d4dd75083fff23d56bdd6cb6c923215266962c0653. 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/TCAFE2011415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd1c275aa4c6e2e84303f6e339a68d61921de844fc51850935eef19e2c8efd8. 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/TCAFE2011423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66c907d67122cbd3f6e76eaa7a11ddd9946d517886432c7f1a2ddb199073fa1. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TCAFE2011469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0e78dd0feeceb59c1301ec142371d981891c1693e9539249bb32c045443279. 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/TCAFE2011485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bf1b705096c9d5a41be1cd27bd71576b6c7f62a1d0acf1208d5ccf9fa5b1ec. 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/TCAFE2011498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1b32a8098dcb7f9c25b58b3451ff0159509d7ee7d46dbd3262a1b5f0af8ede. 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/TCAFE2011511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb421ed0686bc5e59734c5248904f501536a1b812b1ae99875b0bae9a76886e85. 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/QZEQU2401102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1a634767785d3849fb6c798d537c98b966e1b1a3dbc537f745b5efdf414cf9. 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/QZEQU2400592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086175861fb55d6f376989df4703a4e3cb4e537f235ee31c563c01e9b87d00c6. 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/QZEQU2400516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3206ae980eea6b998362f0ba84c4efecaec0b3d0d8c96c8eeea87a41c85e46a7. 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/QZEQU2301987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270290acb7de04dfa82990bef10a0205859226be63838a803a7070e4ed2f4a13. 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/QZEQU2301988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac8a5c5b8eceb5357aee68aaec14902f2bbf039c02fe3d30bcc4132704bbaef. 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/QZEQU2301706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac8a5c5b8eceb5357aee68aaec14902f2bbf039c02fe3d30bcc4132704bbaef. 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/QZEQU2301706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea6cbf5c294756246fedba816f624b3d0b811775eadf99a29700dff4306d1a7. 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/QZEQU2300823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664529fa65f3a1f3c225d07daf1c967c6a3dabfb0bc4ed2416cbb6fd12d683ab. 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/QZEQU2300824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2835d53b07421baf1accf3e9be923432d0adf27c4ce62996895b2c605db4993d. 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/QZEQU2300552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9be8805ebfb7c95c340a9db5ced14720120b764e2281c6ecfd1f074fe61016. 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/QZEQU2300825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68a9b669546a876164c65854c1567798e8974d7573873bf5f9a32d06988fed3. 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/QZEQU2300826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2835d53b07421baf1accf3e9be923432d0adf27c4ce62996895b2c605db4993d. 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/QZEQU2300552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d16e68c6e1b4d54afba7e5bc52d3dc718af2dfd09961087ce41e3fcc634e567. 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/QZEQU2300183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3203f0b17adaff5a75ad5c83ac5edc77920021bf92ad3521e257f6c801f97d. 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/US2762202534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d9b62558e039886022db7d4ba46aae55288867289f4c9d519de7fafa8d5d8a. 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/QZEQU2268097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42d3bb55fef7b53aa4dc2ea1f8ff02b3ccbd92f1406be316981722f2e31e3f2. 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/US2762101556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847b83f2e4f082f77cb49063a75860eb39c4262fc94439808f189b3e5cbaca80. 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/US2762101149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e0f8572234646f5e71a1c128679c00a34f48d66c802395944451dd9788c3c2. 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/US2762100767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bc457ff28c1258669a5be506035c8e5cca7a3ab70eff0772e62cff549a4eb4. 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/US2762100336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3791959c8a9651111e51bb5feba6ce5cdf84ddddc5a247db9a15320db633338. 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/TCAEI1965904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816916e6476291b45d6a0643bf3c9eec6a7b93941f603d63bb8f1c07f10f9613. 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/TCAEF1978984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b481fb555afc308965f828ac9fa60aa394313e515ce71bd5a5da3eff67eb0b0. 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/TCAED1977046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c1b9dd07eebb803dbecb55c38d38c9a2f76356d2d0d687e9fffe0336790df3. 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/QZEQU2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb15d90f5ce5620c3675d25df7de73d85443ebd2072a5f9d3d4bdb56ea33a70f. 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/QZEQU2402326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70df40170b7fc2b1492a444e0b0a003ff86e2f0f4b8f697c6cb4d04fa5984185. 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/QZEQU2401927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c38072f53cce52ab51413de3fb77c257a01a1bb8368652e1ca52057afd0a442. 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/QZEQU2401591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a735f414d2edfb8d23a17ec50c3d4c1720e6823d41061198723be1770f11efb. 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/QZEQU2401303.