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 0xc140125b46a6d856719311011ba8ddef2c31d985ef77a5e854845596ffd68b02. 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/8794b304-6af1-4da1-8ba4-66526e22d75f.json and https://artists.proofprofile.net/proofs/artist/8794b304-6af1-4da1-8ba4-66526e22d75f.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 0xbd7eaa0bac34701ffd6324a2e8f45a50e6e804869ab2b074d88e5f00ff046124. 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/DGA0M2424316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f13aa9470e4d6e916efece4b86103e8fa45f901f687ca5fa62f40a950425d88. 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/FRX762475459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a4326b76610da833582d90de63c96cb9c74306e778013744f349dc6d86e284. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA092420323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a8976d0f60241e072b347e89e9519036a8c3072f016ea78a6ee97871b63ac1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2470154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a484cc91e76a3c291f96e6e228c23247f8cbc236f6a9c0639deb33cdd7fc3d0. 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/CA5KR2470155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cd67c124f6dced99e40162b9d079e501fc2f019f966938b1fbba98a18c8d2d. 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/CA5KR2484335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee5315f30db5a111bd87113dbfb19dfc88b299259e3787c1e1879d3d4f22bca. 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/CA5KR2484336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd694e37cd00bd80129a04b2d33794a8990222fac32385268fffd760555b97fb4. 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/CA5KR2484337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cfebc565aabbd4a96d508e13eb00209f586ab664a272f8fd3b1b367a3f830c. 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/CA5KR2484338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa69166e53ce1bf1322c839bb2e6d3af04341276617d3d9d24fa285adec68457. 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/CA5KR2484339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614a34e69dda9dc4288b21d583edf86be08809cd150e6dc7d36df5b687bdb331. 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/CA5KR2484340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9603e0117d8ae3418ae0ded7f90ea0c39e3e361b88c5eca737d9d22a3f676c03. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2484341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9b769c1465afa34f4f26ff242109b6d5ccb632aee0ad8cc7e295d5d295ca45. 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/DGA0L2403677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc682aa7eef512e080dc3a3304d859cd51178cb5f17d528af9b973de7f138e734. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0L2403678.