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 0x695b0f8778d4fc14974c9b61ece0b6c2dcd78dc1ee29e4fafee0400b9dd10943. 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/ffb40ee7-164d-451c-ae49-07dea95afa7a.json and https://artists.proofprofile.net/proofs/artist/ffb40ee7-164d-451c-ae49-07dea95afa7a.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 0xa74784e846f66e5813c1408361bb5e4a18acc643527b13dbc034fa6488ec65c2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN72211414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb159bbafbb580d23848ba6746d27359bba78ab75ed499e5cd8c0504325f80a3e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:26:42Z), 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/QZHN62236170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb311c7a90afe0f21167c692c370e5b816fc7f830eef7859907546c8a29629e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHN62251003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570dd503e8a70a0cc62ad4fdda3b02ee3f306862649394d43233c6c37a3e7990. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:29:47Z), 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/QZHN62254129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435af0323100651ce60a2225b2b97d12a81a9dbdcc1f58530595a6892ab3a253. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN62251866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dbdc71558f35e1ac151ca987ddf6270be970b44f7df13c2c1af739520a8651. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZHN62251868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f77696d11346d6ddb1cf8f8eddb63d8ef986fa88c1670705e7a814319bb00c5. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZHN62250221.