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 0x90e951d511ee0e24cff777be9bea20f0afa0f8c26ab385077d9324d3a8c6efdc. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d97531a9-831e-4219-9e79-577a533c341e.json and https://artists.proofprofile.net/proofs/artist/d97531a9-831e-4219-9e79-577a533c341e.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 0x3392eb12c4007e000df87bb4ecc207c045c693125bf2b70da1087f7d2f07c626. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T08:01:20Z), 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/QZES72576193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c91976449826ea976e95223f40c4149109bf312729a2946e2eef0726ff4819. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZK6M2510165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38242dbd11a4042af27f022a1260576bbfca3f01a35c4a17220560d2a06da4ae. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZNWU2515275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42cc1fa88c38df69787fb9b338aa05254e2a6bec90adb4bb6bd235d73477acd. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZWFP2497243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436f38521b4c78eeb8c7a2f0d043e93ba3eb99c37625f7d59ff898a61375577c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNWV2459815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c64796c9207b6a37f5e877eabb3e9ad538ad834322758dc630a1756f7e877d0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFL2519821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de13294710f52bac07d2da29332ebe7f67a65493a25c5ad005535eadf3b4542. 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/QZWFL2558887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0301945f3aefe76ac69772a88e3249cbefa605a9866e92f8e930894b8527350. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QT6EE2506464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4b31fbe00c078381f9fc836830dc872e7f1087aa3f24773647205a1e000afa. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QT6EE2510273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9e41885c462f6b18a7be0bb0309aa38735dc7e4dc7a63b76c1097eb2bd6a33. 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/QT6EE2510277.