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 0xcf6d8633516c9cdedbb967b8c42074bfff007a5f3b542b9e3c3fb225f8ead67c. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/afbbdd24-dd62-45ac-b82e-fffdffa33f86.json and https://artists.proofprofile.net/proofs/artist/afbbdd24-dd62-45ac-b82e-fffdffa33f86.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 0x96e5877719de53c7232c31d4a63fa9138c1fc34c97c469446c6b05b7dd8fe327. 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/ITZJN2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc70f3fe6b788e81accc77acb7d95979598e6db218470f42ba725d2b7026a931. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ITZJN2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8ed95a3d67d4273af9257c95798a98d404f7b6d6fe9f5ce6fef53e5ed4afc4. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:19:05Z), 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/ITZJN2200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a4570fa1972d87f2e2a7d7b2ec0df7de218e9f5a40141ac9db835731d657c7. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/ITZJN2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a124563b19b05a58a87a30cddbc12af96daf2e08b07003e91ad34f64e83a6da. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:11:36Z), 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/ITZJN2200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc245e1fd616d8cefc5feb25a90cafa5594eddb552c594858c43ac2cb5539da4d. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ITZJN2200054.