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 0x71d93e4f2bfffb8dac08fb0c55786034a1f22b31ad7328605c4e303a1919dfd0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a2ee047-1b7e-4b7f-9013-6d2abc186b27.json and https://artists.proofprofile.net/proofs/artist/7a2ee047-1b7e-4b7f-9013-6d2abc186b27.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 0xe8d9bccc77d6a003cbc33cc58cbbe44a6f6b1bf5770ee0c5df601ceed37c4b91. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZ2J21505821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874035e8df5429e581c8ed29e377043da395439a35f138771ef7198fb03b5222. 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/QZ2J21505822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51638bc693982e60ecb5e646a00b6ea7047da71aa17fc7af834f20108728b2d. 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/QZ2J21505819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5eb666bb03f4bbbb58a0682c50cdc14b5cce2ac8cacb04695da386fc238093. 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/QZ2J21505823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7e508ff37888faa1a95c427880e173fd7991d7ad6af60c5286dae13bc9d4be. 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/QZ2J21505824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe699f5c6a75f34ce25c35a58efbe7adfa4a0281fa5d33ce46c99a9dd1067314a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZ2J21505825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7410a94889b9bc2766a705c73173c7b8de3bee6856b3652ce60fdb00103477. 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/QZ2J21505826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56fd4aa07461016da7567e7685dbecc2bf7aa68d0754c3aa078f707c9e2a8e2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZ2J21505827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36972c8afb181017f9e3b84b22ab9ddf2692396c8427290cb3bd6817f7f9518. 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/QZ2J21505828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f366d626e7514d801d93331307b4bd31193e3d982ccd96f5263751a43299db2. 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/QZ2J21505829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4d9c57a0ec0a7e477ce10f833358bb8c82906bb603340bc0cd7e4eae8b10fe. 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/QZWDE2258679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51638bc693982e60ecb5e646a00b6ea7047da71aa17fc7af834f20108728b2d. 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/QZ2J21505819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4bdb9f7c3b05141a8d8051ccca20b6dfb6a7df4fd17228b1f788e40b69f5a4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZ2J21505755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f872bdfc37c0960c56eb16f2140457ee8679314103a8fef0fca67408b9a6f35. 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/QZ2J21505696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd571b149bbb170dd04050b6f6384dd3031be4c4703cec9162b9e6e382f9c354. 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/QMBZ92252671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff171a8d345d184ba6419df0b821c80b59ffddc4b4f20af12eb8a7178875474. 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/FR59R2418720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01d37f338915d8378e669921e7d0f1e8edbf8031b98060ff81cfd7e56f4a58b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DGA0Q2417452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01d37f338915d8378e669921e7d0f1e8edbf8031b98060ff81cfd7e56f4a58b. 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/DGA0Q2417452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb88478b656e6c55a51bfd9e3ba53c29d9ff4da4c17068a05bf6a97fb085a445. 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/QZ5FN2445298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf581aab892e367730e3b136cd2eb07f3d9f2ae26a6c5966601d7a98d5c8084. 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/QZTRX2394363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655459432a0b7f8b5142f50113663f104ef71468694be8a90edd0aa1b02777ca. 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/GBWUL2359432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4def8483298af8502b98af0a13b89ccad899f880b312880abb347d481fbd63. 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/USLZJ2389482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9af9ea0332c9b1367925c78235de68493ec5d9c66a631f00ed86fc50940bd7. 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/GBRKQ2297043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988d4cb5aaa208010aa825a9bbb8be3e7cbfe88bed7de8e310f5ae74e92ded2a. 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/QZ5AB2223035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc00bf89302fc40b53151a35878ae9e8e47e6cb4aef231111ab6520720a7939e. 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/TCAFW2152464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf41d76edae710da76289d5cd7d297e678f9c95667a2468194eab47ba9f5ae27. 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/SE6TI2188071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40fd756a3ef453713cb1757f092b684b50fae6dc5cece487ea3e9b53a41d29c. 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/SE6QE2190971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869f59dfc4825210931f105dba1076610ae8cd735c03068c52aebdc7402fc0c6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNWY2051058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecf6a5fea3c7c192a3251483779a71763e8ac45ce7809bbdc258fa72c8c1ee4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZDA82073769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48e6486db55fb2e361d8a553d378ae9932e69559aa9c6d0a59748db14a2976d. 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/USANG1924637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf383117380c4e0c209304f16941ba8de97715c308fa7be36f1e539efe51b68. 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/QZHN81993412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf501ee3eae3ae9baa69980775d1686edaa4449a277f901da1a0f180a2edfb92. 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/QZES91946748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87f3026baf4ca0489df7d63896224616cf3db605e5225bb69394ed65c8e0efd. 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/QZDA51979927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7147c0ec0396b87f0254207026456cb5041ef6b51eb6817944405225f56a0042. 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/QZ4JJ1949056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e228a9d7037f6a69e2d475316593c3a694c35890a14fdade4fb41801b65c06. 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/QZ2J21507091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6df6f49faea43097217dca319af0d94ac7f491a410bba48438f2b4d4f1495ed. 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/QM4TX2220204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac4e08b5a16aa332280072bb1aad746cfe4add37a9e2ea28129a924318ac230. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMDA61800760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ec1f9af93728e1e203323e6e00a9823051bfbd3f166594e1a978f4dab08add. 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/QM6MZ1821537.