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 0x3f392f854d7a4dd93f29b0e393e709d6f95875d731ef95ec1b31dc8f25fe181e. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2171b16d-c354-49f0-97ee-f0654076372c.json and https://artists.proofprofile.net/proofs/artist/2171b16d-c354-49f0-97ee-f0654076372c.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 0x572ad039a5ae0cd5cd54a80dd41e7187d46f37b1029c723d1f70d17b5d11889c. 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/PLI366114360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2dee06c66c96f8436142b0fca66fd88de149f8561ef72c7b9da83f1655ec1e. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:39:31Z), 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/PLI366114370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619e09fc80420c5e85270efdc99711ef42ae5483f2b1fd9b570d7eb9a26aa044. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/PLI366112390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7335400243eadcc3cba8d6327652cdcc350dacdf65f696c11fca1b16dbb26e2. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:56:46Z), 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/PLI366104680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2b695764ff9a4dd7102138e8ff8ed3c4aa352a48835e3a30cad40126828189. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:37:32Z), 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/PLI368486101.