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 0xfb0a01882953c8ea900589b4b5baebeda75b4b47d7df71129a3ab792ed64916c. 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/37c25656-163c-4305-b1b7-e343fe297f57.json and https://artists.proofprofile.net/proofs/artist/37c25656-163c-4305-b1b7-e343fe297f57.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 0x0eb5217cb40fea2f328a00b5ed4ea6cd8de934e27390b7827a12623e482b7ae3. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/TCAEX2090534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185eb656597e7be1fbd7397b2bde90cf3de8c92ccd2918a59db0a11dc380d3a9. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/TCAFC2090342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afe7ba83d8a116a415f9420e6ffb16e674cfe9acc5546870d0ae7e59ab6fa5d. 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/TCAFN2154029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30583525d53a6cee6d29af61f5a1b943fa47c2811abaa7a5d22efe7c881d9a8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN72121158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4c97f8271be0f78bbf95f2baf9a144b70a216173a53aa7e9432dac42e2cad6. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZK6Q2141111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05cebf5f7caf2098288135de227a7e407a148632d9952dd32744a4452b11173e. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZFZ32264589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7250d990d4a8c5954c888efc2ceb6b1f6d967f8e3d10445cc2270ba9cba2e056. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFZ32282571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5033ac25f54e24def62535f5d880c71809c8e58b1eef9bdaa93f36251f11879a. 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/QZFZ32272900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9470c2e7ee388b5859be9bba3735b6a259fec3a2b0ac9393d1414549a3558942. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES72217858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a1e299fcd69a9d9bf73c5f8e3516fa0b6877aacdac727ccb4fe465bf233012. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZHNC2275742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199285aad7d583e10caaa3006aa4d02593864daf997cef817be4f5e62680008a. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QZK6P2256676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c83b500c406623d0bb03a501695072dc7ddd364ef98951e2b4f47be185eebaa. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZK6J2200628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb0b47e45274ae70b755e94ef39f0ca4026950a23df50ce2de69a8f2701b363. 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/QZK6H2226986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ff1bd4af0242223282d67b7d2aeca048306d7ed646aa612fd21d911e8dd526. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZMEM2206580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5ddd54c87eb50c4326a3ce641235ce5bb089152e6a50b02c5c1b423fd4f764. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNWQ2271489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d486ee9e4ffa35b39abf2b38b1ec20a531ff119f0afbe1db05cdaf10e2eaeb2. 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/QZNWU2289096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b73ddb99028a3efa19ceb6cd5f0b76cc5e3eb70d29c3f091215ccb23450dbd. 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/QZNWY2244530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5c115ede6e72774e29836e012d2dfd31b09da326c1fe4e23a4175f9da24850. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZPLS2211331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8e1aeffe6c67f4372dbb8554f5c059518be97f2df8094175b0c0c49e6cffc0. 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/QZTB42296968.
Sasuke & Itachi Rap: Villain Of My Story
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afac022ebd6c94de557697d63433bfb68587544a6066d28f9e4716b4a6e5938. 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/QZTBA2263338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a879857f2e300536ab8826c8feace8e8cb4b30d579af7633777fe7e26b8da6. 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/QZDA82302608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091e3f61970dd393426d2665c9caaed03351edc8c74cda1b348344df20ee2fb8. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZES72318851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d091e246281d33fbb772eee480f3b4b8cb1200c900ca279745a1c39612f520. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZES82386889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3956370868baacd93eb017dcab0e32420695ec0228adfb3cf18acadf854da9fd. 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/QZMEP2327028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdae8b8fd383dde05cf9af2846b8f229f49fe78628496f621d1d3176fb087f13. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZMER2353292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c381c03840d3d5438b43de5e3ba400f40aef67965f066fe50f674ab9b4e83b7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTAX2323873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5030f6b564438b5e609cbf6b14cd8ecee7a2fcf7a9d6b4305eca832f8f89e558. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZTB52304739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf78e05ec9a67a36303146af9ffa39c5342eb498a5c651c67fad6c7242983bb. 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/QZWFF2368544.
Moving Shadows In The Dark (Cid Kagenou)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d22206087c0dc83408bb576dc5eba5a0696d28d8d2788735cf191954e1993d6. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QZWFJ2418308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9651e20d9f677b6d80209c500c3c85acf2ef36332ec15fe71f8302e250a51367. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/QZZ7T2419485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c63460493e949304a87de90e1150bdc7403555def8969e4303758bcabe29861. 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/QZWFX2570960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c2487f77104d8e6cf46e50f52674396bb412befa42c083cfc7b5e731ab04c9. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QT3FA2531195.