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 0x89bd6eaec6b7b9057da3377a0c4c69218d267dd1e254b301674b17bcd4452398. 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/11c4a3bd-99ff-4cbe-a814-55ce1f63fbb7.json and https://artists.proofprofile.net/proofs/artist/11c4a3bd-99ff-4cbe-a814-55ce1f63fbb7.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 0xcea98f5b20826866c3c2b357f22896b9ed0e44ce9b4d87652c21b7c73cd64434. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/ITJMO2000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4852ea248fd80a29a184f6f63f2cf2b110f16807af9de458e07e39a846481460. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/ITJMO2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ba5abf547839ed435d1269d2cd8397a14c29f5ce48abd7b1d967f906d41b3b. 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/ITJMO2000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4247c462461ce91460366bd014ae557343cbe1fd41ee6b817d13008ad303ea6d. 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/ITR452198981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf1fae309f93775016c7738b0e839071ed92a920c33616938f05f94423d1322. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/ITR452398701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b7aa2f74c99f5e36c164e757ca34afd0af84bc0413a836d1ba2c7db4a691df. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/ITR452398702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cf8720c0ac64f9681ae5e39186a92beba976bb4625e341f6f2ff94c8b97cac. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:25:44Z), 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/ITR452398703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f336d1f318dbbe6608611a0fd13ffc670d2ecd79468e8775879cee41bf74692. 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/ITR452398708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda077cbfdde64265af812e99fac7648aff2fecf9d374cea281b8934280152144. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:09:45Z), 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/ITR452398709.