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 0xa719589d3737067edcf372600214ea74c9cb2b8af1984b84513b0bce0e38b30b. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0d40928-764a-463c-98dd-118077291e31.json and https://artists.proofprofile.net/proofs/artist/a0d40928-764a-463c-98dd-118077291e31.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 0x7b0641db8010cbb4aab941fe5e91992d5544b655748d698c3340e4c3c9e6646e. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:42:19Z), 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/USCGH1183881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3225db3c9e442764c0173c94892892e5e61be5879104183a3dc9910e452aad05. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:50:02Z), 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/USCGH1183882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7e8114b8c56ecb05360442dcecfcba853b1450019859a520bd48ad182364d0. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:27:36Z), 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/USCGH1183883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf7123a296d3167f09aba66e36133568ffa63efff53321d2fcd8000f351927d. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:43:52Z), 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/USCGH1183911.