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 0xced97c083c4f2526894449741f4743b6a5ad6dd455e3824e1e86b487e03fb18a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0abb552d-ae08-408d-9a38-629edfb4d640.json and https://artists.proofprofile.net/proofs/artist/0abb552d-ae08-408d-9a38-629edfb4d640.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 0x0c5f6d599007ed8524ffa01cb9e454c5e8f9fce9ecf48c975ab0f2fd19d755be. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZB88L2400005.
Ngizwile (feat. Lington, Zee_nhle, iam.psalm, Phemelo Saxer)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bd92b9089946cb6da558d9c0e20699886dbf9ca4bd605543c8d39688ae8d2c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZA56E2303999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e8374fc6fb825869db6d8a6146ea3010f5b7bc8afa83c193645ccd5d1fdb73. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZB88L2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a67752d7f34833ca49d2c24425dcfe0141df260f93e8fe5e6761d2f08ee934. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZB88L2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25881da102666c0a605c098ea3c13db5451febea877de3c4295dae1c974a1d0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZB88L2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5f6d599007ed8524ffa01cb9e454c5e8f9fce9ecf48c975ab0f2fd19d755be. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ZB88L2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb978948338364103dad1ef50f38e79b55ce9a67bb4c020e0f5d622b7b2e2ec. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ZB88L2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4f2555706b1ec650d9e40e881b8f60f408000c4ac391b24b084cf34182ecc9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZB88L2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2b1d1d1c1a7922171d6e14c50fe377c22554fa3d52c6b75d62f64584d931d2. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/ZAP5S2500021.