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 0xebf8ba2e89983305df58741c4f6f9faeae78d57a060bbb0b43f1e4ea36e88b04. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9430258e-c78d-4bea-9b69-8b548390651d.json and https://artists.proofprofile.net/proofs/artist/9430258e-c78d-4bea-9b69-8b548390651d.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 0x7db7c7f8607daecaf7d9e42f787a8306dafa890c79e93fb584abc5ccb7f163fd. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/NL4WT2200236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa361222b5524365a485af6aa0014fbf01883c444adb82f9b2b2aa9f8cb9c57c4. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QMFME2257280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07aa6a2eedc51b2ad2ca5bf312752fea6666b2667e6f7c65e7ac07ff8caf4a9c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GX8LD2302509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7b07165daba4bff75be84d2eef287b719002849c024541c2b0f1fcf531c014. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:22:15Z), 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/QM3DF2217977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8dc8fa265774d22d0f25cb0432ebe3eb4384be498254f69b4becb80693ad54. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM3DF2278719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1434d31479ee8acd52a3ed60aa3c3692ee20b0bf85cbeffc42ffe59d008b9d0a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GX8KD2475370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca09d73599b50c7c33a99b17bd453206fdefed221c805de02f459a637b6134f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFH2414861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb912704eebe3f00ae2287b30c78c4fd65a46cc27931b5615d09b3fd42800068d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-20T00:01:28Z), 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/QZNWV2516533.