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 0xa3f76645c073a3a7a371174e9108f8213f048ef57cf72eb05b65bcb98521969e. 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/d0e37cdb-946f-4f2f-ab44-46b186f0f78e.json and https://artists.proofprofile.net/proofs/artist/d0e37cdb-946f-4f2f-ab44-46b186f0f78e.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 0xcb0d29eea1887aee45b9ff5e1c9c992aa41946de0bc082438ed9f645283b52f5. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:10:37Z), 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/USANG2273698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b91808e6f46fbb44bb3efe3384fd60f60c64f84fc7b1862c69f222bdbd5a08. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:08:05Z), 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/US3DF2406384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772549f07864949e1b3db00dee1654996c121b55d1015690833d501f8ee22d49. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USANG2504487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a3d5658bde0f52f4bff0de289e1f85249e03408946f6a37252d4cbd85f2cb8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US3DF2417663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d00b058ecb625dd9014b45c30859bb88fbba82aeaabc982976163bbf0acbcb3. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:41:06Z), 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/QM3DF2270062.