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 0x72670260c74fedda5db383d4610fe0bda73bff76f414004d3681fcd1ac131c6f. 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/baf5a6bd-e458-43cd-a766-e77241e0f0bf.json and https://artists.proofprofile.net/proofs/artist/baf5a6bd-e458-43cd-a766-e77241e0f0bf.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 0xfa80dbb2bb27e7adbc39d1fb13e1c06e6ff2f83df9d917cbd3ece6f48d6d5ba6. 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/DGA0M2330171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ea9f6f1d38d7a74f417020718a8c1574fe096eb3a1f8ea8c4c5ac957ff8b0a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX8LE2359386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a41c1f75e9835cd326ed07d605ce9ad10efdfac3d29ecce67ee1fff3875164. 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/NLT2H2300359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936f080d38c82b7c48b9458431ad8ca06eafb849a154a09343c5c4e6c2cefb92. 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/QMFME2161538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc00305960f999f89f960525f31ee74c62e4f372909ec0e7e0bbcc432a60a6a. 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/NLZ542301426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe0b9b23dc3f89a4ce55f1608a1453b6801f98302a353ac49933dc3e835b28a. 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/NLZ542301109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b87d522aeaf9faef5cfc5b2aca8090a7b61adfe494ebcc8c938b4498cbea10. 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/NLZ542400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f623edd03d9f84be4563ed8e6606c8ecef880f833535e83441a1114d1d52416. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/NLZ542400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54888347f49eefd0fcb7d03cae63aef0c4cad9c738d2d7b9004cd2552c418633. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/NLZ542300917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cb024ad88671fae5abab4b20bed44efd5df3ea818b2032eccd3da33b0ffd17. 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/NLZ542400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b69c5c00f86fee28e6dde0c3d62c7e32720d483f1806795034ea575cf1bfd1b. 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/NLZ542301270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cf4336c00ead52f392d64e63e7628ad5c509e4157cc1918b2c65a13636e7d1. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/NLZ542400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00760bcc179de526cb5b21ad5f49d696be3f46e00b4574fbff7298adfbe04a93. 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/QM6N22498769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95266ee492a4c5c2162343816836ea9562a8ac96ecf278369b92af3bbd9a918b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX89G2316871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5507dead673fa750013a2276f5854a4c47f6d9646571042fd82806e863d49a9a. 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/DEXW62400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4f76112db413a6032bb0d46e78b7d2b8e56e350d76183b272545aa69edcf6d. 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/DGA082348825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fe74c8c1b310bf2f34f43ada5aea97e9548d795c4818c8fc296ec5529a2415. 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/GX8LD2335730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8076ef05d56081023d51f1f51c26e980ca1e060f919207f4cff71e1d63168f. 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/QM6N22279051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a357303fafe82f176d079c2b80a93e5ac18e98197dd7a0b51180a6d6547693f. 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/NLT2H2400355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9f0a272e3d8332c69530a1a9320eeaeb63ef237c1f25a49a73145c345af0ed. 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/DK4YA2354001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a5c2906f8cc2e8c7ecdbba7913e6bf00073a0086b2bb2190180fe15655903a. 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/QM6P42488076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5474f7ad5626f9454369fe0a66c87b0027feda1c10e26b2cff52f2b62dd151. 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/QM6MZ2291150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f017f4aab294471071d702c5d3f691679cc89f47af12488215a0bfe4c2df4e. 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/DGA0L2344143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a1971bbc02ce44a213c4dbcb23efe34cdcd1876d1e127fe0475792422e8072. 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/DEWM92200834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05ce87c42cd793e82896f0ec29ff5ea94072d6c471761431ac8ee8037480a07. 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/DEWM92200760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521da55efd624219e9c0f09dfb76c30ffa2d03bbaee7925ec0cca5e20d16f30e. 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/DEWM92200598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc176b4bf02eb1a651c5d9a9a886cb25b9451c6ba4c0bc14282292184bbd3e1f9. 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/QMDA62208929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6f8a30327821718ab28a9f0a9d4643412fb649c95e30e730660fb824e352cd. 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/NLT2H2100237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94da69b494e5682cc1d0e24a9a729b8254708fe82ceb77e98d93cfe655a55585. 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/NLUW22502770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93cc10e3f93c8191b88ca1ed1cbe5ed32081d13e4e539ac7c590ff0516784d4. 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/NLUW22502771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0eec2d751e60e6e6ccb1d26edf764fb9baaba5ed6c2e82ecd8ddbf0ca555f1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLQ8D2400752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadbf7f812c6250c222c7df92d1b95f93f8547a25887a9ecc0648607ea459e30. 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/NLT2H2401066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1481a40ccaf2bbbfc0c65c9ba59647a7a24705b40b5c2d54c98f4a4d57456c83. 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/QM7282496276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1711934078a1d920a072675b5ef841c22db72e33849cdd0d829f9816e5ba0701. 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/DEPI82435118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd968bfa61bcc40d710a90fa28fd1a79b517ff377d72459b17286c7c53aec85a. 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/QZK6H2447312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a78e6e3b48e5e73610a354e6920f88d2cb671bda2493ae638c1119c5b53b5c. 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/DEWM92200617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18bca2c91499d909fbe11723878d460858ba530ccc6f8b8b2272de0f89bebfc. 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/DEWM92200581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fe74c8c1b310bf2f34f43ada5aea97e9548d795c4818c8fc296ec5529a2415. 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/GX8LD2335730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e32ffc574ea304e1c3c4eafca2a8535e39d2723d6de0b66f4206a7aeaedfbe3. 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/QMDA62234685.