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 0x7c3d26044f3318d80ada23e75ce1b905d5a7d0fbe4fc11fd810161ab874cc7f6. 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/7e029f53-6d47-4df8-bbb2-4440f3d8c082.json and https://artists.proofprofile.net/proofs/artist/7e029f53-6d47-4df8-bbb2-4440f3d8c082.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 0xdcaf0b57a982bb3e07d6181b37353f1c8a8732c16f46456f207a104d1dae5dee. 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/INM432400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b8b63c110c860a8e8550fb456602efea5b99f95794bed6ea319cfcd7287d39. 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/INM432400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7490ef50aeeecac2b35f7ff1f51f140ddf1333521ea526b27058d76f0f46ad12. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/INM432400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a75b68bf8d431864447cdb500a63c61215d476906300e027e61ab48b9868cc4. 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/INM432400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65f59484fffff986d98e6c8230d029dccfac358f7849169a127225e1a0524b6. 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/INM432400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f55360e4308181e62935f5482e52c3c0343bd3bbf1f263cb5d248bfa8f5c8bb. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/INM432400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f90f06e4c7f9af19f39a72dc796ef9260be26507e2196563abe4e41d8402d7. 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/INU252412448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb1092c49ef8d8b614d31140b6ba1a6e28286a1abe83823f1eec78a7ebc001e. 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/INU252412407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cfabc146a5fb94ca393d230203294b82de449c4402f2a2581bb17f7c843822. 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/INB802000219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03654d320826336ebcb9bfa77c2052555d5541de0838d8420a0945091fd843c. 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/INB802000218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02201f0b140945770dbeb25c7c08697df1fc3f5579fad2fecd869ba7e6c368d. 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/INU252311829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce8d044eb1e414fb7fe5dca47c0751e98493f2bd14e0b6bbe719f892a9adeba. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/INU252310719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa3a01a1fcee58f7a99907200436a21f16700c01639a08cc280d5f20674421b. 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/INU252310603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3743aad9fdb7ee3421ac0ea3a65831059b47f33d829b69a9183e31782a63411b. 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/INU252310411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad05d66d8c13845aa57aa8f7b10ad62c6231eec16a09fb32146bab232dcc4436. 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/INU252308974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7a1d484e15875678c1e494a83d5a6b989a64eb9c0a00415d5ec002a82bf782. 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/INB802000174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23669aa28126d0082fae166d6093a2f1f25b5a0424be282de4da4964e7cb3d97. 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/INB802000183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520cbed662e2a5fb9db7cf4b85e9c04fd0adfdf397b67440f230a44d0feb548f. 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/INU252207100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34580106b40a3f3a446eade8c767ecf41ffbd154ae001c53ba3fd7d24b1b8e28. 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/INB802000148.