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 0x30de61c03f4147a65ee66e02fd4613381226ff80b1833707c36fa419f52ec7b6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8274f3b8-402f-4c6f-ab03-ef652a2a7f85.json and https://artists.proofprofile.net/proofs/artist/8274f3b8-402f-4c6f-ab03-ef652a2a7f85.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 0xf2a0950eebbd1fd090b487d470daf35961d671c69292e67ae716981c5d38bd4b. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/QZQBC2100077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2127684a9cf351c1a3492f84ad06c19b3b35f49031171e15134910956cb730f. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZQBC2100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca37e7d2c4378b2aeaf6e633735c88a6cb06fbba5b6e0219ba28f256eaaf6bb9. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZQBC2100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b4a6ef13776b7be38f75474608610f19cb08e08af0a21f94462d89a5994f3d. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZQBC2100078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6fe67848fb8ebc6a36d844050853526955eb395dc588c4b0466b050996e59c. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZQBC2100079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2b4fa6ef4ff4f03549c3531572def6e007da1c63a36388601d01b4ac56b8da. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:43:16Z), 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/QZQBC2100080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ede3e685a67660e3e80ef0822d3636460b38c38f670bb4ae4719afc12948ddf. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:13:44Z), 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/QZQBC2100081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553dfa8eb1a33f79bc25b32c31936e2c8a73c13fae64cfc0057bd9ea1274af91. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZQBC2100082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f8431197a2cab24bd9c22997ce868618d0315898c12caff5623bb36df55ab9. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZQBC2100083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36a5c174df58799f4056f7c0cd2f1903f85a84c282a4bf549517dee39b7999c. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZQBC2100084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ba1b6c355f26049cbf5747350670bdf2626cbb3760a63af5ece2efc8ec3e3f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZQBC2100085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73075730bbaf6b050bb1f851c6ddf25613353f2f27cea55204f5ca6063c8140d. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/QZQBC2100086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d43a5e5559e82b722194c91ead9d51afc71834caa6cdbe1396f8aee96dbaa9c. Chain 2 (Bitcoin): anchored in block 957868 (2026-07-13T14:56:55Z), 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/QZQBC2100087.