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 0x52d40e15bb81df97a0ddc1d7960f3f378f188e0a8282a5739bf0566e1de6ae6e. 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/506647b0-1f67-49fe-9d59-8ada8104fc5c.json and https://artists.proofprofile.net/proofs/artist/506647b0-1f67-49fe-9d59-8ada8104fc5c.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 0xe20ac32775d71b47b68397785dfe710ffc7c06f3aa48c23df903ccee5b6bd3c7. 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/QZFZ42217297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2832575db60dc4e26860a38b1dd756980c0f1830fd14728111d6c5d80c422d79. 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/USHR22316203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102fb84ff13d94d0db8762103312933cdff0fcabc55c144d7753f4825455f6e8. 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/USHR22316202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bd921c77ac60847dd51f2d557255cf7834bd5bb69cad530400f6d55cf64a96. 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/USHR22316201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102fb84ff13d94d0db8762103312933cdff0fcabc55c144d7753f4825455f6e8. 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/USHR22316202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bd921c77ac60847dd51f2d557255cf7834bd5bb69cad530400f6d55cf64a96. 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/USHR22316201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bd921c77ac60847dd51f2d557255cf7834bd5bb69cad530400f6d55cf64a96. 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/USHR22316201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca91ffeb3ff91f8ffefd13f6f154a5e99e74ae510bafbb8d16dd7812b544b64. 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/QZEQU2300134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe409306d594a1a0dea6240051aa2692edb3e312a74d7aa344c98a651c80a2158. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZEQU2268115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe409306d594a1a0dea6240051aa2692edb3e312a74d7aa344c98a651c80a2158. 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/QZEQU2268115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9657d804b259b562d2e661620a94b69384869c051734efb3a8bf781fd9d8b76c. 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/QZEQU2203937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4732a55cc3e91f58c69aa34978957287e38d4c1c0877b18a1aaf1b2ded96c4ce. 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/QM3DF2171869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9722602ab01a18796c1865015118ddf878537ab0287ace8e9d41c0b7887cf871. 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/QZEQU2137834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d2a7304f4876a6b2cad4ecc72e61ab88f80b19f48ba4af7e30cf1ae8fe19d6. 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/QZFYZ2122034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909044a86ae95d137f48514694ca67b806ce1158566ebae608bf627421fc4143. 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/QZEQU2125703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48a7939c29e1a401123db84e0a7b1d8f30c2211d66cb72e8b9009dcd5f43a93. 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/QZDA42177165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2ffc2fdf6b50cfa5cd6648580864a9da554961b921e73c7a7511ced62fbe20. 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/QZEQU2137835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b87d461b583e5450c22a7cc6d5083a9060aaf273a023c56a6c879b050408687. 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/QZEQU2132575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b87d461b583e5450c22a7cc6d5083a9060aaf273a023c56a6c879b050408687. 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/QZEQU2132575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909044a86ae95d137f48514694ca67b806ce1158566ebae608bf627421fc4143. 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/QZEQU2125703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48a7939c29e1a401123db84e0a7b1d8f30c2211d66cb72e8b9009dcd5f43a93. 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/QZDA42177165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d2a7304f4876a6b2cad4ecc72e61ab88f80b19f48ba4af7e30cf1ae8fe19d6. 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/QZFYZ2122034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7f89c4d0e23312ea27d95a883457b99f7291d0c3cbfa1a8614da3ae0b514d9. 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/QZMEQ2048679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa975585db32e881e428fb23702484070d1b8808fdf6383083f4ae4fdaf65555. 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/QZMZ92089467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8f0b4e64a872b58e14df16a6ec75b6c6f5fc9672ba9976aaa4d2bea5825ad4. 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/QZK6P2076048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67510febb9ceda81fd2b96bf205a03e5a60a34d14f02a5eebe7d9a472f93591. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QZK6P2076049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc172e72067783b81075b1b9437f1a43a6839620609549715884ac173317814bd. 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/QZK6P2076050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9c1cb35a86a051c7d011be4a1c37373d69fc0c8ad80a6aa5469d394d4f3f1d. 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/QZHN82056975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5278f74f5c9cfa3e80f0f20d7860d488ce54d3320f67937a1d9709b574a374. 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/QZHN42026225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccde9b2bf030c2f1144c31cdcf19ed434fcc79465869011f9cdabcbc238ef1f. 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/QZES82008286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754acf7359e080fb32cce202825db3fe5e0646dd8c1fe18941954600396c33ea. 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/QMBZ91933549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e57afcd387ab797c318027d466cd9dccf72cab5e0568dbe26a43a25ec55e26. 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/QZHN61960943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191930a52b1c41a771edf666cbdf9e12446d28289bb374e3b9598e188bf484bf. 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/QMPKX1855830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5553ec4719d3d3a89ab45470dff63e326a5afcbc407a6d3ea59c8a0b0a2769e4. 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/QZDA61885730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051d07b2b69f0ad44e8880c282448f5494a43eb242496de65e1a6a4c31597729. 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/QZDA41835361.