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 0xbf4c7d46a9a4aabb6efc1a99e142a3be632adf5df86d68e79e7d9f0da7ee9ab5. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/212ebc65-f9fc-4c68-956a-cf3bcfc4c3ee.json and https://artists.proofprofile.net/proofs/artist/212ebc65-f9fc-4c68-956a-cf3bcfc4c3ee.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 0x1170dbf8495644ddd867cb5634e237ec10a33673b597ff0ddbe38c9d02a16614. 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/ITFR82200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87e61b79f8b3275b3c3cfcebe4ca424c945dcda05ca34116cd6d61d2fd29270. 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/ITFR82200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac05d16f8feda87597a2ba1bd4d706cc7801754318722ea820a43dd5de893174. 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/ITFR82200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070cd7a57e5dddc903475a43df50ae67f8995811f73107d92d8ed309f4a8938d. 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/ITFR82200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cad2e4da43066ac3f419cd2c5e15fe091c0c7b92d11a9c09727046b3d81daf0. 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/ITFR82200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79936e16cc373d0faa7c8b70f3bce95f998d5ce3c23559ce3a02584536f2a1de. 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/ITFR82010054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89f0873fcd4613a040941d922d28f703b2c982ddba0bb4e059ea38642270599. 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/ITFR82010055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf26b0eb4dff633cf758d528eb399695d925b84e6bd06b1e8cb8ac466c05aa0. 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/ITFR82010056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3212847d43d15414c793f69d2e6e9252770b3d9239f4fe031711a0c20693870. 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/ITFR82010040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe965b22f47f12574ddb89af665a42416b878f9c51c174e1d4b6422ec75c0dee. 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/ITFR82010057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcca7e0845486b6d90ba86dafd6e915f1f180c95a57b16ef20ae31410667e503. 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/IT7SU2100205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0328b57e267f1cd06a64f0eda5a51fe253f18add3bcc9be03ddd6480c635b5. 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/IT7SU2100204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa175c92ceba6845c2fb9d6b86bb92031285f82512150ddb2a94237b195df32. 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/IT7SU2100202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d5b92db3fb741e22486680dc7411bcfb73fb2ce8c3bebc93295994846e713f. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/IT7SU2100203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b2592141799e04e0aa1224c7da90eab35c46a7c2029b8685a80a963d2a06b4. 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/IT7SU2100208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ac2b9a2d032bb953fed5445d2b19ebda20498a43625b3b3b64dba19de0c073. 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/IT7SU2100201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bb91e72b33927188ac7575c3f88a8653415f163e023765522e570794341108. 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/ITA642100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9769c3817990c3fbfef27d9061f0b0a3d66f1a5a6eb5104093a5683bbb5f0339. 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/QMFMF2012035.