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 0x3ec2c439eda0630485f9f0498b8b38ea4a2bc86bacc4a9e9ae218f010d9a2a26. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b992de09-78e1-4541-b521-26ce14a0fe76.json and https://artists.proofprofile.net/proofs/artist/b992de09-78e1-4541-b521-26ce14a0fe76.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 0xe8a81241e509ad45421f88ec3b213a8ae662ef22475b3c6f967d8bb9c6051afa. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTB72326115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410264a8c4d757aa55bc7735c5e39aa9c6384e283ffea50d9e9b6c83415ac2a4. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:05:20Z), 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/QZNWT2489104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498cc69ef3df216b2028ae4e81a4c8322a0dd7ebf0982a650dd0f4a93192bfd6. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZWFL2547597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a74751ada4deda70df1a97efc0c7e207ef06fc767a0aab861d249d1097608d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7L2548019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13c37ebe9db77a13acd29ff06e5a5fae7c9ec454561fc3a529d7fcabf22595c. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:48:46Z), 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/QZZ7L2548020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9814db386615fffb5b788a4a59de1886ea1ad00b0e3e22cfd990e613bc0e16b4. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZZ7L2548021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b65fe1a6ef073b05e4569135b450940829297f8ef276550c43cfe531072d929. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:49:44Z), 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/QZZ7L2548022.