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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951f5c1ff4f02c1fceb437a0bcdf5196565893f8704d5473a35ed4b4a8b81ba0. 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/56d31e88-5aa0-497e-afda-9442a9d5e001.json and https://artists.proofprofile.net/proofs/artist/56d31e88-5aa0-497e-afda-9442a9d5e001.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a67d5ac3d09cb489ea9350cac28b8ab4e5f77ac695177044d5e72c35b8b982. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/CAHQJ2366989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362f8d2ea95728d650e3ed9dac056bc5dafec42cc169b50578fa9ef16d7613ef. 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/CAHQJ2366990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6dc4c913d5d977271352574eba885364db50c534ff0817e1d96141e3189eff. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CAHQJ2366992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95dd5b7c70fda6c6e8551b02412d0e2855c18861557f5fe727e5f640dd7521de. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CAHQJ2366993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6152aa037fc4400697b3f011672cacf2a6a9c47b576317da9dd8170852b0b3f1. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/CAHQJ2366994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cce5cffa6c7be4355a8fc29d7412b6595e9a82b34ccd47a8f1b9731cefa3e7f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CAHQJ2366997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4047d4f4a2ee3dbd125259308bedafb56f96cd3a65203d5d6e0b0c6446fc7315. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CAHQJ2366998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf956e7782f806ae04a18e0f9abeead86ba98e0c8e8afbfd056cb01924ac8e24. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CAHQJ2366999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb607f0cc662f6b87b5ba0989b6587dec7f9bbbf2ebf79016394b4a9b484b940d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CAHQJ2367001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18205ae40cdbb11d6566a8c5dcff774844052136993bc0f954a737225b4a0d64. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/CAHQJ2367003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21af22cd9cf7c8d3f7c19d88d4b8ae2594c02f775a6ec99db35cc6c787612ab4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CAHQJ2367004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958fe401ea528a13d66343ccb2c6ff1ad9454a478136c12cb483c0d14a5d0976. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CAHQJ2367005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e8b3ad6836e92e0c21d06ea17e8d2099ceaad234854fc3235368ddd5d9e346. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CAHQJ2367006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf64df3f65f3ef61201930d617f67995a598968c010152d979682625245a69da. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/CAHQJ2367008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f43282c41a970b8c8f69872118defd525704f6c99c3993f944c80da0aa5856. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/CAHQJ2367009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab88c3071bdf78ee21b37c4e68647567888e026558a6c2f640f3d736e8912be8. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/CAHQJ2367012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9390c20dab61ee8d776ac1c57f7c7d9c5b019ac5bd89dc933dff052e60047058. 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/CAHQJ2367013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7149865dae27c5c712a99081f11c88692112f63af63197a5505e1295f4c10bd1. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/CAHQJ2367014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa99be5dd587de4d1596b62d798478ee59ebf511f09ff49511ae74b56a04d172. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/CAHQJ2367015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce9691e64c44a22c9ff4a38776ce8da683bfea72010fba3a8786adeffcf14c5. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/CAHQJ2367016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed23393ba8fa06b64b3ef71084bbacc4850d92dcbeab1ca1315b062668329f0. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/CACWV2331352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4536030d2e75e16befe9a537a54f7f6376826e9191c087fad90d12aae885ba3f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CACWV2331353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fc37dca85eb914b55174fc3dc0195dd6d8e5daf0f6afb54b1d4ae3dfac839a. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/CACWV2331355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931d03b8d90ad519983a83c734c9664a631881faafc31b2b1639fddeef2f4000. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CACWV2331359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a559618de0b949ff4eb69ea67d6573e824a5e9e4e4b2f11bedf03803a99d2a1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CACWV2331360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1b90535e9f5e098346501d157a06159233bfd7e11496f50ce0ffc931ecc356. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/CACWV2331361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0aca2f1157f40af118fa1d7f4ffa77217314cdba3cb764668da9cf9427f5635. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CACWV2331362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a614cf2bb10f19ffd61cb91d46cb6838386bfca2bea530996f30363f03bea7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CACWV2331364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e79bf5319f67e404516076c6b7eca31a3a91792a96a0996522a48b9f68a8b1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CACWV2331365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df77163fe1ce4a869f39d8c145d3e51825c2dac5817af297b7e38a1e15ecacb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CACWV2331366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd1a2f4df29dc0cbb0497544a1924e053a65a584516ba40a436318eeb1b4792. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CAHQJ2367000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c89e4b08e1de3a6d540049674c0230a225df43bc3c483ece1f3b1a747b2e1a2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CAHQJ2366991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa99be5dd587de4d1596b62d798478ee59ebf511f09ff49511ae74b56a04d172. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/CAHQJ2367015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c083779d5082362c1e5833b7a2b2f2e7a48fe4e0bbd1b37cfa5ddb547eeff0. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/CAHQJ2366995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cce5cffa6c7be4355a8fc29d7412b6595e9a82b34ccd47a8f1b9731cefa3e7f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CAHQJ2366997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9390c20dab61ee8d776ac1c57f7c7d9c5b019ac5bd89dc933dff052e60047058. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CAHQJ2367013.