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 0xbbd0ba4377bb5bbfe752fd3077b41585b5f12a7cd9ebe85d5ed080cc39d9d4cc. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbee5dd5-0969-4596-8b2d-31fd73d74726.json and https://artists.proofprofile.net/proofs/artist/cbee5dd5-0969-4596-8b2d-31fd73d74726.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 0x205cd866110e4e5fd58c9c09b579f66d0570999c8f614a5a0f9733bfe3f9cc63. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPZ921709792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1d29de9df6935e6a9c7c2966a200b88691656d6cff345fbc6a244eb3b84780. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCJPH1805894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f176c3f496d2c93549f41d3b301f66412dbf4d4f0179c63678409101e3ae00. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:27:33Z), 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/TCJPH1805902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a63f7f2b55f911f05a1300e7966705e7c020f5add0ea1ce981d104a0d4a782. 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/TCJPH1805906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc75df561469ec64cb22dfcc19224d0fa160aa0dcadb804b9bb754f954351b3. 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/TCJPH1805911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b14fa551dd0a214ba10114cced9ea5e34b7ae8c1d98b848da6d6feaa52b5b06. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:43:32Z), 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/TCJPS2264876.