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 0x312c1055858421dfabbcc77902a0976c99c41e05a36f391f02d55db9bd0ea28a. 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/440745f1-11bc-42ed-ab20-1bef5b28df73.json and https://artists.proofprofile.net/proofs/artist/440745f1-11bc-42ed-ab20-1bef5b28df73.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 0x8f584415061dd0a0841e95cddd459162f9950cb6499b92a597c095140282d8d0. 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/DELJ81470347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0af1054a2898fd09e0ed4bb171932dec1cfa0896b3ec7732acd50123893464. 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/DELJ81470350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3aa1b19e63faa731dd1ffac48dcbec36bbc1ecb675e6f092fc9630a4d4b0de4. 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/DELJ81590974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffb2bc90aa2c873a722529537f398530aea3fcaa23e7fa32ba59d20652dfb27. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/DELJ81590975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641804344064c6487677d646d7395684bb2e2c5e1df0288ff292a9cd1b12e26c. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/DELJ81890392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fadcb3227bbc105ebac7f7e390174bdabbb11a6cc9b002046cc5553e2a08e42. 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/DELJ81890394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e65184ea055d1fc049cccfe8998cf600d601f59e84fe3d91e30bbffbb69136. 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/DEVY81900064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6828d4896422fa687aacf08915af6fe21f9e9295e7a94ca1e9a8e4589915bf8. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEVY81900065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268e4ac79b0d332abcaed0ddce465796009e0cbdca76c87e2fa5c70712ba865d. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DEVY81900066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b1869f81957077c7ee587a5efc602c51d9ef6e92ec4899268a3cc35381b889. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/DEVY82000307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4574498795ff0feccd6d83ed026d6069a762513e450692d32cd03a590685086a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/DEVY82000429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6b86a98e36946c76f202f2b0e32c01871a5c8c84dc48b832a50092c9594c15. 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/DEVY82200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57871fb945e3dae3b542f8ecc948cb5f05b1a334de73ec9e98ce7d4e1d8ab03a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEVY82300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe030355acf6a46f3e2d5fae780e785a6abd6fee1f217124441481d1df47faed9. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/DEVY82200055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6b86a98e36946c76f202f2b0e32c01871a5c8c84dc48b832a50092c9594c15. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/DEVY82200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09caac2468a8261c2fb0bec6adc1f01e8ccaabe132b0d422959767dc2a209102. 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/DEVY82200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57871fb945e3dae3b542f8ecc948cb5f05b1a334de73ec9e98ce7d4e1d8ab03a. 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/DEVY82300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b1869f81957077c7ee587a5efc602c51d9ef6e92ec4899268a3cc35381b889. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/DEVY82000307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823149f16b12ee67fa099b57ccda167139bae4649dece7deac4d0c393479f560. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/DEVY82300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa537748f3c545eece7a5e55a235741377319f48ec522acf8e7d05a87fad13e3c. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/DEVY82300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbf698d138b1dd355ffe31649fceff4f7f811af447a44814fba738195f1dd10. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEVY82300230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8b5086f19b1c049535d5c7c3e094567b46eaee37e12e326140c1028790ff2e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEVY82400553.