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 0x7d4680c78bf74281b596b677f2fc94ab28f4c4da912ee1fc7ac209f032221b91. 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/db456ad3-5eda-442d-961a-4661ed4ec1d3.json and https://artists.proofprofile.net/proofs/artist/db456ad3-5eda-442d-961a-4661ed4ec1d3.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 0x595364d051339eb53a0d636b9dda002305e08fa84e8798a85d852cb16c5dd2e1. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:53:10Z), 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/GBKPL2090259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de11e9d4971bc3ab8c7f44af9408026aed09ca52ecf1288c48ac501fa255153. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:02:43Z), 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/GBKPL1979452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea6b785df84920d0e176361c297e527d1a73d2495368aaf41d0bce7577a1437. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:58:39Z), 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/QMFMF2465265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c91129aa408064797506d0dd858ab40a873b159cbb5033f52fc4357dcdf2a4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USDM31916801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b600300dca0a7e8722d3ed079dc7a2df0e3e13cbf32173130ba24be83b698df. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLV62418196.