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 0x1aa17817784283732f09b6bca44ec31aa191c20e31957ebf7ff620f5caa77921. 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/a3b1f0b4-2606-4d3a-ba5f-4d2d2ca9113d.json and https://artists.proofprofile.net/proofs/artist/a3b1f0b4-2606-4d3a-ba5f-4d2d2ca9113d.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 0x2a2718725f0ada71928e5ec18fece8fc080acfca8bbbd689e2a29eab95394f51. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DKBA30900503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0c205f6481fcbe2092e1ed5c0a9ff79b789e7c067f45c41b455f75246bb2ab. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DKBA30900505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82004f78321900b2ccf067c610818633a918ac08910b00a8669a0385f639f764. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/DKBA30900508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335501c656426121bb97c1667389c66c1a53593c30d8b4a9eec552765695f9f4. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DKQP51301804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b115245b392aa7a0bbb151004a11140e61bf16b6b4c2c9f25ac6858429ed9ae. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:47:11Z), 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/DKQP51301807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf02e704fa63340409dd88ebd6dc3a8eb6a78e73d96771fd3a1fd16821d2a998. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/DKQP51301808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572418ced812ced9891113e8107400487a76733d06ba29e2f9758215c1b3c0fb. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:07:36Z), 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/DKQP51301810.