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 0xe1844766267bcf1f399fdb02bee551b22ffc95741e4e767cf3a09da349bdfd51. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/305a7b49-5283-4337-a597-c3d8c6b1d2d0.json and https://artists.proofprofile.net/proofs/artist/305a7b49-5283-4337-a597-c3d8c6b1d2d0.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 0x660c47d57e9508baf16fff33f0ba4e0f37d15b24050f930f4df8cff4db6a940b. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:34:04Z), 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/ITY862400238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90332863dc3d9cb73e0371513e4aed4edb0553071f69cf400763fff1682290ff. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/ITY862400231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05122e5fb75ea02030267b0e1f00433c07ba5cc75a5bfbdfa955c0f2fc82ffaf. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ITY862400233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cedb2dafc1b9cbedf8864aa6a6ed2240e1129c1265f2fce1f7be3401c9c8e7e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ITY862400234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161bc0e6d2f8ccc8c12fcd720773d24cdc7975fc045921744122ce683ae473f8. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T08:36:55Z), 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/ITY862400235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb0e9ab80fd4e117cbfcd931bcf50418f801a37b768d8ff8199f9ef1ec59529. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:32:50Z), 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/ITY862400236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660c47d57e9508baf16fff33f0ba4e0f37d15b24050f930f4df8cff4db6a940b. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:00:20Z), 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/ITY862400238.