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 0x3af6f7aaa7c98095ec1ad02b60f9e1df43e17462383468051e2fc11c1a992988. 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/8a14b7a1-6987-4f3d-b3bc-9c7cdcad07b6.json and https://artists.proofprofile.net/proofs/artist/8a14b7a1-6987-4f3d-b3bc-9c7cdcad07b6.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 0xc3a270c27047057a3f45de57338d1867caeb53811b9810e0c7920d9ef99e5ccc. 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/US7VG1607656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd2f9f93647e981aaab3305e0c6b82002e86b01611dc48e459ac7a40a68a944. 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/US7VG1607660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6c94bc430ac9e35b16f13caf0e0c506b1909e6c1b4cb9dae5aef42e5dd6d34. 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/US7VG1607661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ec9ed4fa3808b3ac90cbc2aeb4d201995f633d30839a17cf09b1ced9b66cdd. 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/US7VG1607662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc3a54adac70b35d82b087fac8148a977cf4b6a25f46d4c04f82ea0ce647406. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US7VG1607663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506e0f8f79149543e9f2d857a9f5d4065412273fb1b37f35ba9ed8949f30b3b3. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/US7VG1607665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10b42274aa995e48ded1f6b3679c2f811213a47dd455f5d805fd0e521e8f062. 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/US7VG1607666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0414a9463028baa85ab660a5a9ee104110f8fad8535f22c6c238f9e6e35e3153. 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/QZGLM1934149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45f6b74f7b8b26245d62d1841d4f8440015e2e4a6e6eeaa743579bd1d1b2bbf. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/BK1CW2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcfa33ff8f8bb14129c208f255ed0096c4e6c97cdbcde72165bbd8661470f65. 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/QZGLS2103648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1791abca8b0c4e0cc32d5cd83f41e6a36690be7c1faaf60c2e6f6e2cfaaf5dcd. 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/QZNJZ2194527.