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 0x6c0928e83990c9b029710c40533148cf4d73605bca720581fab79e18a34c0125. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9e6b6bb-8879-4cca-b0a9-fa8b3bc85849.json and https://artists.proofprofile.net/proofs/artist/c9e6b6bb-8879-4cca-b0a9-fa8b3bc85849.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 0x9a571c38d94846e11a9248114999761efedd484518f8bc73d8d32bf1c83223f1. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/MXF019000305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62226e115af177a6fb81e54c64a39197d075a89ca57305cf93c583a2c3b70645. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/MXF019000307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bee7236974c5d01bf11a4d0d4a3c74161c4e5e5991feb5880db46cc65cccd80. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/MXF019000308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8b0eddf200d15fbdd9d80b4ef319581893770417a424f2036bc7dff60c85bc. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:48:39Z), 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/MXF019000312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57224b06db605736499bb26e56cb3a8545c1ad1fd55363396c7e57224c57e34d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/MXF019000311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33366ddaadcc301cd6de289e7393fc3bcd401146f21c8f30fcd482ecf23b108. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:34:43Z), 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/MXF019100703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4505e4b742dff630f7fffd17322899cfdec677625d07950c750e50c8ea93cc. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:20:13Z), 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/MXF019100704.