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 0xcb19a2ffecb9d284078463100fe989822dcc3940b54e6e99a13fdaa5a4f382f6. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5f9f6a5-30fe-4cbb-9cc3-2d8f5cd7917d.json and https://artists.proofprofile.net/proofs/artist/c5f9f6a5-30fe-4cbb-9cc3-2d8f5cd7917d.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 0x0d1a8a73ce1198352114d0c85866ef8c55522bc040a1b4621a30ca751813e0b7. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:48:22Z), 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/QZMEP2349730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d16075909b5aef7958faa02c6b708f879600271721d578e2e3c9c01d4c488c3. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:24:56Z), 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/QZTAT2319012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ea30814692d77c44ff52c1e7387b86c6a1c30356e2e4c27b33838a20bc30a0. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:00:58Z), 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/QZTB32413593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a6202ea122a8680627a53626af93fc533e18d15423cf682a230a69713c443e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWV2595579.