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 0xa88f18dbf4ea84bbf42205762f07da0ac6e2d410727c74af7d961e939739462b. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d72abd9a-fd83-4bd8-aedc-4906fefd7c41.json and https://artists.proofprofile.net/proofs/artist/d72abd9a-fd83-4bd8-aedc-4906fefd7c41.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 0x5b3f25b0b9c26bfb70281b8dcb2906d67bf5df985a82bf1fb689262c4a9e959a. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QZHNC2397205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd99dd0b8126a55ae856df5dfe6d659a40c18fca5fdd0e0647f5160ac32f74e7. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:23:13Z), 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/QZTB52375273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa182f7138dfb461af88f2e9ad838bbbea7687c245b9eca181f3e80f526d1471b. 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/USLZJ2453085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a24d093201f27a943c3bbb14f00892ee2dcd7ed2bad72560fd7b62251a3e6da. 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/QZWV32438616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e7495545a570a871c636de0a842d7e1f917883acf3701159ee59a99aa08722. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZZ8B2456701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831acac4e8c78569e7c3d8420f600036fe3ef38e3fb921055d384b951a08ee43. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBRKQ2566925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd606502269fc4c15dceec498567bf5798d47710e5dc921558b2933181eeacb. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:50:57Z), 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/GBRKQ2566806.