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 0x0dfa478d29c3d8cef7427fefebd158e0866ed0a64501762e831985be7cb5d8bc. 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/1cdf73d1-c73e-4ccf-9f4f-0dc2ff051d3c.json and https://artists.proofprofile.net/proofs/artist/1cdf73d1-c73e-4ccf-9f4f-0dc2ff051d3c.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 0x5cc907e172fadab0ad6cbcdbeb4ca4a1baaa8718cb5a2c70c1a01a73aeedefae. 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/ING642302091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85be391854ccd1a5f304d6b23261bc972d283f615cdd435a7e357b4fa97c57d. 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/ING642302090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bbfb3e66629e17a6f09976f1d196f1cad217f3c8f6328a388769409847b15e. 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/ING642302085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e9a41db1de8135b70f2074be1f6d51aec84d6b8e20ab23910eb61976d65782. 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/ING642302102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2649c37f3c5e76b2ee0b41d57ce878c5ca7c6f8ddd3d1388d8b623fad340c54. 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/ING642302084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6518817b052ac19260b929ecdf2be7d7a7aae99efb6801304790f1d62c0815c3. 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/ING642302086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947b15e85811ce14a2eb6511befec45ae84cb1482aed88beb031944237ffe59f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ING642302089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322542d4a220580b1d6253f07292d4beeaa577b277cf55437b646c20118df3f1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ING642302078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda355f7399745b1396dd69b5dcdfca03caa339d92f81fa71cdf54203c46992ab. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ING642302081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4369e4fdccfcf18acd9dda10fc853a09872f406b1626bd02876aa28e760fbde. 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/ING642302088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37faddbfe26f1c6dab5c44e01ace63d2d2a36b39c2f8d7c06492d89940273ad3. 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/ING642302077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7729585f5c051ed72e08a86414042da0930eeb24cc6585508ac502d977e96d7. 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/ING642302079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980b5e74e0b91207c2f6794f97e667242dd7ea80058b72f23e00eb0e0e6beb35. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ING642302087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc09bb8de43c3f02eb119e0d9ea7d09ac7b1a9eca4e729d80c1252452d4d1d30. 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/ING642302080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929d7a00ceacb25f5685c4e624725e6cbb6443b3aa1ec99e0ae82d9d59ea62e5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ING642302083.