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 0x41f0b77856c9df1ba6636ca097c514e7740699f9932ed3d7d9fb4f92942e163b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3ca4719-14a7-4992-9360-9889b063412e.json and https://artists.proofprofile.net/proofs/artist/c3ca4719-14a7-4992-9360-9889b063412e.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 0xe8672d9a5caa9f276ce3d2517315aec69a1966023a38275ad7d9456442985b15. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFZ61990575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8cd8de95f0fbcf8228697d21af514be8f8883658b7ea5cfbae68fb3090a875. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:07:06Z), 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/QZFZ72004061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3664c39719a4eee934edd0c3a7e8ff3233fd4a92ed4c0319ea1dd7f10e3ca09f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZSYP2196028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e409b9a544bbd3f8f4dc298ae2f2992523e48606ed7c815289e88544a3bc7c1. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:30:49Z), 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/QZSYP2119482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e94a022591d46bdf7457c6caeef358154123d4169e03f0d151af4fa923572c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZSYP2136721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf8c2ec35f9dbcc9effe42bf05c6bddbadc1ee08af07b4bbe1dec7be1c821ad. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:07:35Z), 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/QZSYP2408359.