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 0x82f0c65afcdd35e6490e98bc2b92bc5b6fa7d858cf6bb12debee9c006abb62d7. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8fde0556-f643-40f3-bcad-b79938feffcb.json and https://artists.proofprofile.net/proofs/artist/8fde0556-f643-40f3-bcad-b79938feffcb.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 0x5832437437ede76cdd7c28d240dc0396c626911ceb86e9e91928e8dca3ef7fcd. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWV2202276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e71b6b9d0329d72cd0f003e49f8c33e7eca02bd1eceafab5a4ab1c1c7bb6a8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTB22201517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc132a6a62dc27c250766987436f28f8aa3a349aa23fb60a099e6708c9c24b5d8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFZ62351344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd5839d2a33efab3f4ab14f2b668f8729cf51060f8c3a63d138b12ea236d5f8. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:53:22Z), 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/QZFZ62351345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ca141e700ce2a835de40f21ee51add17bb97d9a892dec27c752f4b48df5649. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZES82341743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2991765db6b90d71e530a6e8d99b2e549338fa184cec3c2f8610f56719a8d121. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZES82341744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbb1715ab2b74090faea4bfd65963c3102c0916765a6a74282f08e94ec8e353. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZNWS2342154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888727e61cca2bcf3c519671e8cd857fcac35aba6b5ac5ab80d1a59aa30f65f4. 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/QZHN92493566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19000c5871e00261545f9f86142f756ebb0c3ce68e58238afbfea729622fd165. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTB52405237.