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 0x53e824637637cdf7992ac928f8482ec0696761869ef8b607a69d1e5eaa8bfd3b. 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/95c8e27e-ae39-4a4b-8a56-d7b5f9107f1d.json and https://artists.proofprofile.net/proofs/artist/95c8e27e-ae39-4a4b-8a56-d7b5f9107f1d.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 0xbce9584fd2bef0eb8c7b60973698d9927d4e9ef12f7899232c3f621ad48c28f3. 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/BXF852100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5150b89d83244a293262c60cb7d975fae7b7a9f40ab3d60819e92c1b59b41cc8. 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/BCPY02100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3147717be52731289d8e9f804246e7f336a599411b3367f8848d55d933e5f18. 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/BCPY02200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1c9c0be70038aa0f0d522f9eb0afeb58df1c71bfe31fd5498ef9c24db3a2e3. 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/BCPY02100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee865c1e4fabc0a2af586ab3faff60bc81caed6d6552e665be3a50dba899c06. 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/BXT8S2100085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1141d25d26e4c822b38d782aeca2a82df40663f6cca072eb26b61dc1a3f7bd8. 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/BXT8S2100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb62b7892a96c215903c8541c29e5a4584ef79674b99c19fd3d5e439814a7d0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BXYQS2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1f818e3b4bcfc2a4bf0f11931a0109ce66465334dbf6173d87a4843b9a006b. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BXYQS2300002.
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 0xc76def3da28c559e059b8bd55abfff0c2909bf7f1979052af1e07de8e5f3fecf. 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/BCPY02200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57eaed18f588388afcca7c42c92707b5c51f3b85933e90b9ee2b97d6755df9a4. 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/BCPY02200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63fc427eb31ab0a19d21fb600cd71af3feb0569c5d4fedd2b0234f87d2faffc. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BCPY02200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a6232e56d2dadf198e1040b457a638fff453e233727f70c04961c2aeffcb1c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BCPY02200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21e209465aac3ac107b300822de9f269f926b0e291bb5b35327a132463cdbe3. 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/QZFYY2150821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd033a382f9368fa8feee02b1e7c60517f8671ddfa1380ce15411e7cd05ad8ba0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BCIG12000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd58b82b6656d8fb074615fbf41cd7b613c2ed2f90e5cd919e877b65730ff38. 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/BC6M22407401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ea02dbe2db8b6a9dc875c4c19703f18cbc2e324b07425fb56a9c81579726c6. 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/BC6M22407402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8334669237e05c57f74a4dd97a8e4ea4716bc2f04b04c1213eaff43e6e17f437. 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/BC6M22407403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012e0e4c3df25be6c4f56caed8d50b4d2b827b61dc0be0f88bdc4b35adaf7921. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BC6M22407404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc097c682979e67e88ea9893c56588cd2f020941be93ad4127d4bbd74f43777de. 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/BC6M22407405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7383b0a217745169e8e20908da03096a58cc13e163606a4d75d7554f0246dcb. 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/BC6M22407406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2035bcbca46a6f85a7845152e5e3e6f243112c59ac31e4416d3ef15ffdc97e0. 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/BC6M22407408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83df84d9f472d30b9643e1ab34f02b082d5ad128619ff26ca8053dcfd9d1249. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BC6M22407410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf622d977509bb676d3558cd86b5e9a40c72f66fcbaac65b124d0be6d8eef55e7. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BC6M22407411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e571b9cde6d3cd7c9571eaa43b8200724f0bc5ffebce7b39495b78c53f1e77. 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/BC6M22407412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c2b44236c100c441fdf546f1fd8dab7dd25fd33cca38aeb91b07d57389287d. 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/BC6M22407413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dda0c5094d023660538bce9e36e7516e146aaf243e80f4f0ccc91dd181f5023. 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/BC6M22407414.