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 0x8ace52103613d3a39e8afb8436faa9853fd10f0b172438a5851f07a0bcaebe67. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a027320d-66f2-4108-8355-2676c4f83f09.json and https://artists.proofprofile.net/proofs/artist/a027320d-66f2-4108-8355-2676c4f83f09.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 0x0f7d0d7f533fdd9b0ebf3c15bac3394115e4bc595e1083b5fd2ae558940fee0d. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/INR832504313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98aedcc1d1d820f1b3775878433cb7490f77c19c1df08b317ca9e6e992926fcd. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:32:00Z), 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/INR832504314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2003954d4346925795e4bbc7b8d1c41a0b7caaa74ebdb32cf514dc4ea320d5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/INR832504316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06660cda59182aa588725d6b9f0d1c92f5075730f59d807d72d644b42ef82812. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/INR832504317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe380acfd14f4ab781b5ac2999ffdc49987dc684218bfce6418bdf6c62c1b2b03. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/INR832504318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71575e482324e75081e029b0334d53fca3e93827e3d092acaaeaa58454841712. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:40:47Z), 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/INR832504611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f03b7547639facb40fdccf2c518f1196a087ea011445f4a28babe51edf1326d. 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/INR832504640.