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 0xf82b5392a2a8bbb38afde81eae131ad5334ad7fc480290244cf1f3aec678ed1b. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2e1f07e-fc73-451e-930e-edc8609ddfaf.json and https://artists.proofprofile.net/proofs/artist/f2e1f07e-fc73-451e-930e-edc8609ddfaf.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 0xf5e6a7d3110a32953fc0cef78de2c14b2db6c6dd39451bdbceeca5e6f7c4e807. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US7VG1210867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0b3d85537b014d72af24423e09d7accfa8aa6145cbcdaf93ae4181f20fbb94. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US7VG1210869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c39b2522f810cfe3f706b668f77dab9dfe4541a0316ec26a62ad58adfc7d144. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:03:51Z), 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/US7VG1210875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd43ef0d79e63b034b83e509cc3defd759d62e70b19093d4ebf4494292f5d7f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/US7VG1210876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1fd15b44441efc6f932db3cfecb69f84d8b345c19fcfab60efb34270e52c07. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/US7VG1210878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba56ecec6fbe7c23b7c51f2a5b359e693947239e4abf4c6662a064f840fa8b5. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:50:20Z), 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/US7VG1210879.