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 0x0e9f9cdb89213e598e74b7f6efa79915ebcd713e3c2f6a67976286c288d31cfd. Chain 2 (Bitcoin): anchored in block 954019 (2026-06-16T23:44:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37c71be5-5976-4fb0-b8c0-cb9b81e68e49.json and https://artists.proofprofile.net/proofs/artist/37c71be5-5976-4fb0-b8c0-cb9b81e68e49.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 0xafa5863474370a0222ee1c3698f1f0c533adaf956ee0b0490efcba13e840ead3. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QM6P42521421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa97275d76f91699ab07949e0d8c0ac05d2f78dfe7d857180a9e559f4ff18cd. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:50:54Z), 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/QM6P42521425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d8b7e96e3554e1735de1716f6f1e6912859b63faad8523aeaedc771709db51. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:28:41Z), 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/QM6P42521427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56aaf3d16764c265d095d49affeef41e2eae87e39897df5c8fcbca08284d08b1. 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/QM6P42521429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ae9b6905ddb0d373304fac2268aadfd366e61a3bdd485c89a2a6ed9fd8fd62. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T08:36:32Z), 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/QM6P42521431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e69929ddb1af8bb390dbc633250384154b61605a4ff2ffb1067e784d53ed084. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM6P42521433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a93cfe8b556eca39262027b6f43bb1d364f705681dc73923045c1739fdbdb75. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM6P42521434.