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 0xbc6bf185bb133ed65e896e77cfc74d0bd10ad922ae02faa0f52751d44f33d220. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6eb18e40-52c9-488f-98b0-f0176af021d0.json and https://artists.proofprofile.net/proofs/artist/6eb18e40-52c9-488f-98b0-f0176af021d0.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 0x4cc2d0373c608e982ae24bbca70966accb8081496c0d2ff1b7200a7fbda835e8. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QMDA72352131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13320190635b4e15e19b416b8436a5f9a01c1a586005b114ffd9d227229650ee. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QMDA72352132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a47c16f96c337f4e319da13034db1b7be8b6c8cd17ab65fc6641dd2d7055011. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QMDA72352133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7297eb2a584179e6d216635f6c2ba433591963753e5b8399154da0d02c732f00. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QMDA72352134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b016d70bcc011282110da72c18ee11ee91e438ca149e8a3ce3b28ecc48417e2. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QMDA72352135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05da59db08d789b450443de3cc58b94fd826d5d49cb9408163874b3c0de83e0. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QMDA72352136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb3d85efd36e13d11a0f786d82bc45789cda303956941adf23f35b4c41d6bf3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QMDA72352137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede6e99942174b4b5886ecb2c68408f70f6dc06f37d48f546bf0e6dd434550bb. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:23:11Z), 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/QMDA72352138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fa1ccfd8c56651e57f87647dde4cc8522ec4e11cf1902541cb31f310d73a2d. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QMDA72352139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b50358a71381299619964d77f5c659cb988891a6b4b9b93b6b8a630e45da95d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMDA72352140.