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 0x037c6dc84008df6c28fc756b56502171cd48bae0afdc405093c9ca5f53c0f1a4. 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/e62137dc-8d1a-4f06-820e-d50055c86ee8.json and https://artists.proofprofile.net/proofs/artist/e62137dc-8d1a-4f06-820e-d50055c86ee8.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 0x29be92c9b9df23693e9336484a1e2ab7a22b17576ac136da5fa5d54572476fdb. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DESJ21800201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbc2fe2f4f412d164c4af75e6d363cf6875107b74191ccb78048482e7b10bf3. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/DESJ21800202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a671b6a977fa9dc4971ae2c5a429ffa0135bdd683bf688e992a661406d36567. 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/DESJ21800204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0737fc3ddbdbee50f8a0218eb4d403421b7963cbaacd841c6ce402d82a2b612a. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DESJ21800207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9859cd98c7386736164f1c9a3f09f0a7d87f295f8bad45146d68b8789f059f38. 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/DESJ21800208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3804686320a0e66c5f5fe0849abf345958173c0981f1bc20540ae418b904b23. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DESJ21800212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8217de78886c96edc65480624d37fff2bc846355258a2a8b50e6643f59d420c. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DESJ21800213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cb1059d672e602cd5263ae4be7ebe1f3cd1c5d1be91f23c3bf58a39caf5b79. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/DESJ21800215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4dfbec8691044e23ec97050cdfc6cafaea83d669a7e5987587538aaa4fff475. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/DESJ21800218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a2ae97a8c36c3002b02e8e6e84467784dd746d68c961cece9498e1c89186d9. 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/ATEW52100506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753082c6dfe3c79fbbd6e94d033880542390cd23a94875b38ab2d032b85de596. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/ATEW52100503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784431202c27f66c472a53105921103087a21d9d90a2e281c2a771ff61258e4b. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/ATEW52100513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca0340d34bbce75a398fb34818c7f3e593b025c50921ec0090fa71800762b5a. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/ATEW52100515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2903dca02463f395b5c732c40c432ad31223a1c96a3ff0c2c9c73bc6815a04c5. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/ATEW52100516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddac115df2413445a63c8bd9f0352bddfdb4ca18e4aa0d4646d083a5173478c6. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/ATEW52402203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92257acca2313fdcbd2f322bf8716e9aac4328d0593dccaebe8a36ae85d057d5. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/ATEW52402208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a37814c56f0f811d286efe0c7dc6bd371ca5894bc36c355142179da47474f1. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/ATEW52402210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef70dcebfa09c39fb57420b26fc6e746e87e222bad6088a6f2815c8a3ef7c025. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ATEW52402211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc685af07ce81d352eb6efa9ff2b3143648c5bab20099ad665948fd2256f1d140. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/ATEW52402212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2672c40f2132c715344d482c4bfe984953217324f923d9c7aed9a9cbdfeb2daa. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/ATEW52402215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2888426bc7bdbdc940ce1476a98ca3fb006659fc8240d83f76781610373ed0d1. 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/ATEW52402202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0218af27fed851d8c43c42b9fdafc550a373adad99d55b671aec59854263133. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ATEW52402201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2888426bc7bdbdc940ce1476a98ca3fb006659fc8240d83f76781610373ed0d1. 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/ATEW52402202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddac115df2413445a63c8bd9f0352bddfdb4ca18e4aa0d4646d083a5173478c6. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/ATEW52402203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24be90bd4ee0137cf6eb163ad39fc2923b4508821d269455cbe2c1e9f4bd33d5. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/ATEW52402204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c52f39afca96c77bb35b1684e63af2c05557beb94b92a6ecb6bb84bc6b0284. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/ATEW52402207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92257acca2313fdcbd2f322bf8716e9aac4328d0593dccaebe8a36ae85d057d5. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/ATEW52402208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a37814c56f0f811d286efe0c7dc6bd371ca5894bc36c355142179da47474f1. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ATEW52402210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef70dcebfa09c39fb57420b26fc6e746e87e222bad6088a6f2815c8a3ef7c025. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/ATEW52402211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dda0eefa46cc662ced3f23db091c8f9f8c071b18060371a6181fdf5b5ab3bc. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/ATEW52402214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2672c40f2132c715344d482c4bfe984953217324f923d9c7aed9a9cbdfeb2daa. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/ATEW52402215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ff97fba5b396d5772fbfe180de44972a97b23293bd16859df5c9510a38559f. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/ATEW52402216.