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 0x415c353fc441ac1495b105da980389af1497458f5a68a9726ad8d2bf38c259e5. 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/d75443c5-3104-42da-83ed-c513cf056c71.json and https://artists.proofprofile.net/proofs/artist/d75443c5-3104-42da-83ed-c513cf056c71.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 0x56edefaf5e390c87793413fc5a6cc4367c4f7b1f6d7572f746b20078b66a9dc3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA370690627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf432cfe62bffc2fd54699ed413ebf375c07dbd5cc615c36b01a53a11cf7558. 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/USA176640030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae963aa6daf8fd3e0487e0fed9d6a15bd07ada5c02ddf37cf45877b4e80db6c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA176640040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd6c0ad5d166d542aed0c54d05a66bbaf2c65798a57b628a00ec3d4a438269a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA176640050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57fe2c9cc8fd2aab197b431d6f93d4aff26645ca7a0fca0feb5f5cc9d18cc41. 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/USA176640060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7b0190fe4822581fba677534c9bcfbb64e2bb33b8aa5453fa0a8c81b571f8e. 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/USA176640070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb186180a778369267cdbc7542d899fe83f6b23c175955b66adc8b54183dcdf7b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA176640080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c27d7d2229d5df71a51e97db91005265eeac12629dc11dc4f272cc0740ede99. 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/USA176640090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929e763d9a722e29ddf9523d538339668f64a951938eeed009359ea24ee146e3. 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/USA176640100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21a98385fb3eaca48c6e693e079d2218cb469d7ef925a5254d897f89cd5badc. 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/USA176640120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06bb5862efefeb513c3dc250dbec76f1317b2543bced0b89bc9fc43dcbb23684. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA176640130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b6b2b8a86e7a48dc7bf8abc68ff56b44ca92935733afac4e3f416c2f856bb8. 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/USA176740010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4ac7b28de36cfede95c2c828abc723879f885c239c1f1cbb6d53053150ede5. 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/USA176740020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e318735f7fd3f9fd0dfdeee90cb9aaace32fac8d94aa995c88ddfeb25c703ac. 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/USA176740030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10180e44274a5c16382b3d629715f7b9a8b967f4b257117a54b97cb6a72af52f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA176740050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e7df6d06bc20a8878847a3614533c28921857a52f7f5eeecd828626b508569. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA176740060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661048ecf413b27ab9873919980d2674c9e763d5d7a631186144107bc733711b. 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/USA176740070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664abc4c95dd7d8912bdadd2d1f3da8ae9a1bbf29a36cdd1708f18892906de4a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USA176740080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2840a5858fbb149e866445c14373314f73e96c23f346df91ca334fa0f0004940. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:56:24Z), 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/USA176640150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77810fde196b4e035b0ccad3b0ff44474625d1fc97cd6954f38cd9d75033ba76. 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/USA176740100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf432cfe62bffc2fd54699ed413ebf375c07dbd5cc615c36b01a53a11cf7558. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA176640030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4ac7b28de36cfede95c2c828abc723879f885c239c1f1cbb6d53053150ede5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:28:22Z), 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/USA176740020.