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 0x1bbc79dc68c7fbce1869cc29b06fb5d1fc282a330405b33a13b3f0a962c2eba8. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a04abc9-f59c-45b3-abfb-419d2ef228a2.json and https://artists.proofprofile.net/proofs/artist/8a04abc9-f59c-45b3-abfb-419d2ef228a2.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 0x5db5afb2626a63c60c4cbf1c4f08023dba502931192c94657ef34662c083df41. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:33:54Z), 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/QZFZ72085683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd13e7892ad1dbdf9a867d2f4eef515664bcbcac59b6a57c50a3d8c9496ff4a. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:16:49Z), 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/QZDA72042797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1256a798a42398f77db8fddef04b593c3398c78e0676114fb7ea8cf48f481fb. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:05:08Z), 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/QZDA82019595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ae74b59df717e334f68af5233b3db3173c9cb572be716038bf69f209628cbe. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZES62176012.