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 0x7e8245a6e1cc1f8693ea01b2e3088ed2c86df07ed713176493364aaf9b8f10cd. 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/d79d4f21-1b4c-4ecf-9cfe-4d3e48cbcfc8.json and https://artists.proofprofile.net/proofs/artist/d79d4f21-1b4c-4ecf-9cfe-4d3e48cbcfc8.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 0xf88f04377901137e5a81f0eba9f2aa3aa8d773306d6e04d38b1be73fc4152468. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USEF20000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d5b4bed6e2c890a23fbfe2d25d84aae12501ee0985131528a8c041066081f2. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T22:47:49Z), 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/USEF20000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca2a1303bef2bd5fedbd65873ad8a29e63c9db72e1552c1d15db729da6285d3. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USEF20000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5198d3e809fe059cfcf85cb1877b46c7fbd1f00eefdfa1591f8b27e2576ca6a8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USEFY0300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff843f6ab2163c166c6b977bf552b02b2292a0822b3cd7e89b07c3e1512f5f06. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/USEFY0300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a387579b1d24656921cf86ac4cdbbeaee4ae316803c18eeffa91828fe3ece7. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USEFY0700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2d2af90a7a51405343a7e60d0d39840ea11d5ecb3b70e40a1bb4c5755cb8bc. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USEFY1500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c64754ee7d7836f4ca015988643a38ac7599ac01393fad7d9080969d96f856. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USEFY1500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9f488a0996a8af1a746bb735c2595de71d19e63b1e63d0dffaf31e63a807a0. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USEFY1500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6380aa2985da5a6963b515b91dc3870380d23ee27e161977aa7ed99df2c88bc3. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:27:35Z), 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/USEFY1500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaecaa35938486e85fadc29a411284e7f590f4c6b3cbdb59779d8567a7013118. 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/US4T72014605.