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 0x4fc6b10445056e2d291c8cdb25b133438873820b72104c0f9944fdbf99e8fc97. 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/6fe041e9-bbc1-4deb-ba61-8172619ceb4e.json and https://artists.proofprofile.net/proofs/artist/6fe041e9-bbc1-4deb-ba61-8172619ceb4e.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 0x82978fc48c080d6b19853cfb26705dd72d8bfb9e03581d25fbf38206ce06b26e. 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/CLAB20801006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dae1e20081af42406143501235f0e72ca3a1c6e7ef8678b3709cae77925324. 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/CLAB20801007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7398af5440f079074fee581f1b0a6364506c27f40f1697e3ff4bf576c2dab7e. 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/CLAB20801017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8665ed6c02cd8b1d07894f2777c9493ed267484e997afa33de4c294a19f32af2. 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/CLAB20801008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60712ebd537fb5e10bb6854009c309fb1cd155a71b45b82962c8d0e4f6bcdb62. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/CLAB20801009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e21b3c00d238f9fa5a9a744dd725368c7f537af6c3497fff7db68cff56a070. 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/CLAB20801019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b56314f4683fc05fa43af400048001fb6a4f04e8e9f915c3de5906069ce8e3d. 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/CLAB20801010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172e9aec5388b97a481b433fd9a4957d2e6fead9ca4e4bab28931fdad2f2d048. 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/CLAB20801020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6195eaeb94074aa977d4070962077f9bd6d2fcb4679c5f7fb54144831f949d. 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/CLAB20801011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f0d94e7d98da06d218659283fff17c529861363cc6409ff48a226778853835. 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/CLAB20801021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896a6185c37dfb473df3630958a3cdcbae1a111826439d8d5141dd1ed3ec196d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CLAB20801012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc891e8007ae0256f35e1f81722bfeacb93fcdaa5d3f0e028b3bf0523975e30. 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/CLAB20801022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721aee1ac98e03c5be7a6db54dcd62298d8d05acd16b55eb0debe6ffd7ee1d23. 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/CLAB20801013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79dc9f5be43ed559765835b341e9b22c718477de78009770926c336a15f1c01. 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/CLAB20801023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42e81231a86b4ce54400c13d522b3893a3be2b65b758943bb12bb92f6868cf7. 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/CLAB20801014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052b75a8dbc4628f9e7d384fc6e5f2430b316455abbc893c1558bfb42e1927ce. 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/CLAB20801024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228ac49c6509d652c21e83dec7a9e47f5c657055306c7af56f8f078e360a32cf. 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/CLAB20801015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e071b2b3a01e0b582c5bee74232423803b613a0d3bf451078abcdbaa59114e. 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/CLAB20801025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bac0b50c1fc2544f239be597ead2af2a07a392d03a955b815b7e33f8cc06176. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:54:58Z), 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/CLAB20801018.
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 0x5374bb1dbd2e7acb3223daa6581df7fa8721a8937980996254577f97146dc166. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/CLAB20801016.