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 0xa2d384142491553829310ca7e6bdfbf53351eca296ef1d066498ef4e9201a1ed. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b4bed6b-fa41-47ee-80dd-db2377b078a9.json and https://artists.proofprofile.net/proofs/artist/4b4bed6b-fa41-47ee-80dd-db2377b078a9.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 0x0d03c4394c27f7e4092756fe6f05959fe1fd3130756fa8a5d8ca3f70ca0c587d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:05:04Z), 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/ITI292500601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35bd52dbb7865440e801e3dda30a98333d56a802abc494f3e3f0983e773176a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITI292500602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8d91d20da9e56d5e411867e61e9e1a7b931cbff2e06534394f86a454cd19bf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ITI292500603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0782a99c7ab5d50dbfb75f71b322cb9fc405703cd5a9501a49affdaace35de8c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ITI292500604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43b177a1b7b2deabb14d6c6c8d3f511ff1c0650b9a07824fc9f8bff56798a88. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/ITI292500605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41128b6205d7e039a76520f7980c8fac21280b5780a70a6f6b321074b99c13d. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:52:38Z), 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/ITI292500606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43390e4e327699878f8ea0882da9bc7a1cb07b9426b45ddc8c4cd716f1786bf. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:05:11Z), 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/ITI292500607.