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 0xef8f9cd67937a5fd3c09b3dc4ea30714db135a6aede8d10fa0732bbdfa933a3d. Chain 2 (Bitcoin): anchored in block 954039 (2026-06-17T03:00:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e35e255-a3fc-4130-837e-9fef98a11f10.json and https://artists.proofprofile.net/proofs/artist/3e35e255-a3fc-4130-837e-9fef98a11f10.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 0xd19767dff8eadb322e0932ecd5a7b96ea9c987c580ab04e61d522a7d1be46dce. 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/FRIDO2211995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2d1d9ffb9cbd40efab329016ce795a52f90e7c92989cbe2651be4f7faec5bb. 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/FRIDO2211996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd8b41f4462e70b97846a2d4e4affa18e676ce58804b482e3dea7667efea440. 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/FRIDO2212004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25141a7e9237eddf363bb5c4be44dfbb680c14f54994bbf953bcf8b59d54871. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FRIDO2211844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889b63f34a9d79c02cae78bb692619b7b545539215aed2f3f4c643d429a90cc0. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FRIDO2211997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20356a95bd3f0f31ed6c3fa4689af86b9678d25bbcea25dc89c6f2b4339eedd2. 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/FRIDO2211999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029c5e49eb83fcc68d743ff1ee7ffff98bb2872df029857e9e5f51828e1963c1. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/FRIDO2212000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5281fcfb058694e4f01be2ba56d4d82e3841cbad8f9678ac56a21810efb3b325. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FRIDO2212003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6909b3f11d3d2b0d4002422103018dd2ad9025223191994e070898ed0d08d00. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM24S1917463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e637b536b078c92adde653155c24b6c76e73e408cda6acfc0da804c7b0e340. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QM24S1917467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9945783c049b72795dbcd5274ae754711be1dc0de120ec23ed605708e86f3802. 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/DKADG2300459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16842ccfa02946b756a57bbc34ea452ccd636eaec7a4ca0d7f6b8812f1deb43. 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/FR3Y91900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552a3179672a6ebc0fe55bb7483c54b8e43418291872c782c67bbc19d7bc2060. 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/DEQ022391500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cdf180f24bbcec753a740ee1f2ee34e7c910397717dfa15863797e2ebdd6c1. 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/DECY52300732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cffd3a9bdfda10af4732ba52452fb6ec2d2b9f4662d8a82a6fdfc8d3a44b3e4. 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/DKFA41600401.