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 0x5f38cf8747bcc2938ef42d22f744ad1257a979c7fdcac5047fba8ed37587c164. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/95701daf-fabb-44d6-b841-f065e79a42d6.json and https://artists.proofprofile.net/proofs/artist/95701daf-fabb-44d6-b841-f065e79a42d6.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 0xa7d517fef4735c5ef1cf2542ad5a797e235196a68e452f1ea007998a4448b008. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QMHCM2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9fea8621e2ae6ea1820556b65d9bdeb6d74c4726e7cc193c1455a9720dd862. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QMHCM2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de9ed9d3d3f6bee28dc1b2b3da7b5cb08c3b713c242381e7d6928325f982b7a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QMHCM2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9fea8621e2ae6ea1820556b65d9bdeb6d74c4726e7cc193c1455a9720dd862. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QMHCM2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92758ba65eafd28a402aae8115d984cbe0e7c52c752d2942f32e80ffc6e2e402. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:48:00Z), 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/QMHCM2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668d1c5ba825892f5ab4e752812d5709dfba8883de28bf96d7d28543180a8066. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QMHCM2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ce5f4603c5c498a3f30cb3eac2b8737dc99533436288b9920679d0e003674c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:53:10Z), 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/QMHCM2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ce5f4603c5c498a3f30cb3eac2b8737dc99533436288b9920679d0e003674c. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:56:10Z), 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/QMHCM2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668d1c5ba825892f5ab4e752812d5709dfba8883de28bf96d7d28543180a8066. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:19:52Z), 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/QMHCM2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3426e90d2bf5fbd653b357dbb48eb0e4ed1c53d467a2f3df5eab1960b6a20e85. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:11:46Z), 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/QMHCM2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbde8359c90ad583f6cc9d42383274eca1b43453840a19ea08425dea76039fa. 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/QMHCM2500003.