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 0xb669a9debf7f01c0c17820f325e70c45d92d324fa9c1770bc65236587c2fc191. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/774e1b2d-c5f5-4403-b80a-91dc29a73cae.json and https://artists.proofprofile.net/proofs/artist/774e1b2d-c5f5-4403-b80a-91dc29a73cae.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 0x683dc09718e085a16c66af2ff0c90fc2237d1ad907ac51ebfecb3c9b0e36ca15. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCADY1819875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75c982c8ac1ab5711b1bf5758d260dbc749148299de5a34dfa14efe918584bd. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCADZ1897270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cea6210e016522627f36c5e8052ffd21cfd0ae87c813ab371ba3e9e0d2bcf4. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:32:04Z), 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/TCAEO1988411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860d3249301a4f24a412d9318ee7b7faec26b3d39bed2ebda70cd9bdb774781c. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:59:47Z), 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/TCAEY2016691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf584b22c2581a411f7c24cb7ab3a68fe3cc6a55892d0e87965970991601df6da. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/TCAFA2040902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80b3a9aeb3730c4291b69f3d389ab9c839b6d6eb898b6982ea25d3eac4aad75. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAFB2076465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c5cf1ccb4cd5014e1a8cbaca5ae22bc529bed8b3f936ca41036ea5572e8cbc. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/TCAFB2076476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07444454ce58e7511ad8abc49ce848a9126f70d250c0aac35781ba64d45ae3c0. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:39:22Z), 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/TCAFB2076480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679da87a5663305d2dae4b43acdb42cdf175a0c8d2577b5b81024eafe7a0e031. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ41915033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e93951eec77d17d92c2f6c4cafce5ac5cc128149dcb4fdbaf6c4f9d329bd7b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:47:20Z), 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/QM24S1833937.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch