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 0x7c34f50d7d2d06558fa829c7c75f5b18dc15fc8934e3a80b7864c474429d9dd2. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1ab03e5-c04e-42ca-a87d-8151fb357231.json and https://artists.proofprofile.net/proofs/artist/f1ab03e5-c04e-42ca-a87d-8151fb357231.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 0x5c8df0dc592590082ad4944916d59d56e258ee1720351a1e0c15e9970312907d. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:03:41Z), 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/TCADA1763543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f673add91d877e8e1f59349248cd02d9d0037694e29649e4791b95b38a3d7a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/PT4HM1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a01137d0b45f5798762db4381b50196b59b05603f921e4855ce7f09a2ebe3c. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:27:04Z), 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/PT4HM2000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8a49cb94adfbc11abf7ecb3e3e8bc0ed2a4924bd8154df2a1cbb865649e8f9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ES71G2325595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb116963d15e1aca71202b69979d26485e067f01b6f0b0a2d91c1b96755e90945. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:59:01Z), 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/ES71G2401682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69272bcd440720cfa6252ab70f117200c8b73b488d9bde5b094326a74d0142b. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/ES71G2417216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5a19731482474cabbc8264208d7fc91ac5188cc5ccd74eca5f7002b37a69c0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ES71G2424258.