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 0x864cf6bee5115cafd8afc05ad0b820796ddcbd20516fd90bda42bd94234c5b28. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ddabd81a-bdb1-475e-a23f-efd23ec5b5dc.json and https://artists.proofprofile.net/proofs/artist/ddabd81a-bdb1-475e-a23f-efd23ec5b5dc.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 0x132d426bc83e9dbd1465c13f59d85474d2e2bdc475209dbae8b351355fcfe2f6. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/US25X2500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be052b41095d467b15d39e5d6af0f7538ffd01a02ccfbc332001c5a755ce5ac. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:10:50Z), 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/US25X2500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f28438c2f49ebc74f663199a8e03b5811af55dd9095604867779034a5656a5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:09:44Z), 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/US25X2500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f3470f6f4ab1b652fec78833c81a218a2e2bf8c4317cb75aa9936c9d274018. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US25X2500107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41a433ff5bbc1d404e844c3af44814b958c95821f11d94782fdde71ec92f2c1. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/US25X2500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34314ef56434bcaab7fba0de9b709c9339bf00107495c84bcd8c914c857b398f. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:36:00Z), 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/US25X2500109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96c0516a16cb99b78636f9355ee0e7bd5173e6a7a7445caa02de2bb9fd7158b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:41:57Z), 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/US25X2500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f869f724268049ff35d30cb0169d8c4529406c5b7af780ca6d1b96d8d6470e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US25X2500111.