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 0xd6b8da576109555e4d35c17c56f5083dce8b51d27e89468393c0072912060100. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc525709-90fe-47d7-85d0-05ed31da88a9.json and https://artists.proofprofile.net/proofs/artist/fc525709-90fe-47d7-85d0-05ed31da88a9.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 0x3fe12d2ce38fe072ac8a0e276ddbd92071f1b8f19fc0044dd5d055562ba5f7f6. 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/TCJPR2286176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5d4a51ffbb103b8a19f1ee081c11ba7b15cf513ea1ea3b22266ce4bea6511c. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/TCJPA2457655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2de1b82d65cb38ce116f18c4235b06d7ff03ca028633920eb615e8149a024e. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/TCJPB2404082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68a68f48d5230914bae16b65f4884e64eab9c081626920ef7fdf2fc973ca211. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:41:25Z), 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/TCJPC2477733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919b8956c126b435d7ef5c525e3d36e53725dbf9148125abcc4af629a0c899b1. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:21:16Z), 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/TCJPE2505790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5b31bf8c93a3055641411f7b724171d7de4f5046545ef36fc460c559846518. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/TCJPH2538869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5349febe8ee8b26e9fc61ddd58bff41b7d783f8fb121f30de3acb157b37453c6. 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/QT66J2521005.