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 0xeec1907394b1cd5a4c484b86a27e6537bbeb057eaee3f6dc4d29e33ff97e81f4. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3cd2f3d1-dd48-4e9c-abc0-dc970bdae536.json and https://artists.proofprofile.net/proofs/artist/3cd2f3d1-dd48-4e9c-abc0-dc970bdae536.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 0x19b4d2606f843b5f3a5846906b43b14a3111048b0660714017d30bed4f058438. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:20:52Z), 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/CAOZQ2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd893bc7e96a3ab7d3e6532a25edd7c46886b01e530e3b1616b42047878579e4c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CAOZQ2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bc50c6e19332982f92a095b5a3b09ee55cae23dd75381c3c7234a5c168eb8f. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:50:33Z), 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/CAOZQ2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4a8f6d39e09c3113aefeb724998bc9c588357ca539c54a0e16b8a0aeb7cde5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CAOZQ2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7201eeaa9cd2469147c2cd84bac6c94b889591235a4e5b297d7ab43aec824b19. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CAOZQ2500002.