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 0xef6f1ceb8054fe4d7c88afdea5f79e902a5286e7839e983f7172a70fbb906eef. 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/dac81995-0599-4e0c-908d-57d4b8f385a5.json and https://artists.proofprofile.net/proofs/artist/dac81995-0599-4e0c-908d-57d4b8f385a5.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 0x614b11b38e89c0a92a5ee8615d8b714084a504bf5146b7c7a8fbbab410eecb84. 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/LTA701900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc105cac7a3258abe6d6470df4edfb5e1edd0aa120114e6450f185c9001105643. 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/LTA702000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4d007e005dbbcd6ec77956fb54141bb4430692702cfcf7bf684c2403c8039d. 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/LTA702000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddafdece10d035c241fecb6e566f27e0d0d44c21de66010f569514803333bf8. 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/LTA702000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f339c539481f9a65d75e321c7c4a3698c75d9c4d86ad00867e2244fa6d2ddb2. 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/LTA701900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333a0435e299563b2b9953942025172370862ec020e546a677d28903574ed2a6. 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/LTA702100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97f17a96b145364cb65fc44a9653504ed18efadaeb4ba9175b3b9faaa8b4f18. 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/LTA701900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a18240e0cddc6ddd26cddc7b34a6d3f2ce44a6b4196945907db2a9bf24dc49e. 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/LTA702000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd434b85b9113b15e74173ca2fd7751ee3c8db95dd9adefc14b2ed3069ee27fef. 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/LTA702000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f17820ea18e499a69dab11ad2d8781d91d8f8a82f2ca0bf99901a3f03080f93. 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/LTA702300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22bf7eaa4a35f5196b987acaaa11ea7b57cb0688cdff7b877548e8f33ba3787. 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/LTA702200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd642491ff6579d29ada74aacba9b04fb6b974157b81624daa54b1e0d94200d. 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/LTA702200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6088fd0b3163b7bf6c1e7a2a1f61f2d8e896d6b0ef0289e0216d6905dca413. 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/LTM892300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe263008603a75fe3e55167a7597d8713c2c97000fd0e3268b0ba6cc4b08f2426. 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/LTA702300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845fba4746120e53997324ec1010220f7e36893d905359208da5c0b241088fb4. 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/LTA702300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abe70ace452fabf5e59804a668a0cab76d0b5ccf2908c17fda0a115b628b794. 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/LTA702400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cf1cf08cb7671d01bc2f082cbabd5e04baa9058342adf64c2b63fee66dcf93. 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/LTA702100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54923d189f8b894fb3f73f5c5a95e569c6a9971aaaa48b5ac03d2d1e6e87c0f3. 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/LTA702400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02ce3b1377f781c61f5efe50c0e17f21da28475dc256e7965dc387cad51b4d9. 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/LTA702400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ce619502f607e8ec9979df39e6144115a754671c83d2c962e2b090b47661b0. 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/LTA702400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334bf1a0c166af18c640261e3860c3ea03611f77667ac9c7abe0e23917dfbf34. 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/LTA702200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaff3e47798f3c699bf07d44cb2bd00baafe29b5266d2dd91f14308132db05dd. 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/LTA702400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24dab4d2be713f38440a06cd30f3f81402f8d66f4b8c8b9d431f9b9aceaa71a2. 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/LTA702400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54923d189f8b894fb3f73f5c5a95e569c6a9971aaaa48b5ac03d2d1e6e87c0f3. 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/LTA702400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ce619502f607e8ec9979df39e6144115a754671c83d2c962e2b090b47661b0. 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/LTA702400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abe70ace452fabf5e59804a668a0cab76d0b5ccf2908c17fda0a115b628b794. 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/LTA702400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8beaf29a2b32f5b79ea61439781885985a8bfd1d78aec42fc078d72cfaf2acf9. 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/QZTBB2331542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f17820ea18e499a69dab11ad2d8781d91d8f8a82f2ca0bf99901a3f03080f93. 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/LTA702300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe263008603a75fe3e55167a7597d8713c2c97000fd0e3268b0ba6cc4b08f2426. 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/LTA702300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd642491ff6579d29ada74aacba9b04fb6b974157b81624daa54b1e0d94200d. 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/LTA702200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334bf1a0c166af18c640261e3860c3ea03611f77667ac9c7abe0e23917dfbf34. 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/LTA702200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22bf7eaa4a35f5196b987acaaa11ea7b57cb0688cdff7b877548e8f33ba3787. 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/LTA702200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cf1cf08cb7671d01bc2f082cbabd5e04baa9058342adf64c2b63fee66dcf93. 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/LTA702100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd032ee7558741740ce471c3dda5a2bb07b79a89b34e94894028c9431ae9d8762. 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/LTA702100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddafdece10d035c241fecb6e566f27e0d0d44c21de66010f569514803333bf8. 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/LTA702000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4d007e005dbbcd6ec77956fb54141bb4430692702cfcf7bf684c2403c8039d. 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/LTA702000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc105cac7a3258abe6d6470df4edfb5e1edd0aa120114e6450f185c9001105643. 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/LTA702000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97f17a96b145364cb65fc44a9653504ed18efadaeb4ba9175b3b9faaa8b4f18. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/LTA701900008.