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 0xbcac5e38686799291c4c415fff3d4329ce32313b0da1ddc5392e4dacbc74ba34. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/275f6771-3a54-4323-b016-5c4aa6451644.json and https://artists.proofprofile.net/proofs/artist/275f6771-3a54-4323-b016-5c4aa6451644.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 0xbe480d6a02bda1f986fa6b9aa7032099b35d7d104d469154894bc8223c912265. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:42:26Z), 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/QZHNA2457424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c57fa7e0f090157b6a13dbbe63c3f95bc3b8655d2708bc4b8c2336c517a0986. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHNB2401046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5b39f7c591f6915b7c07b3ed018f7c436c8548813944009cb182329e23d172. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHNB2401047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be35f50d33ec78e77711cd858ace89f34745c157677139129b3a3382b8cdf5b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHNA2457426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e9071a9cbf0f734f83f8fb34a350db56abc8a78b5044a13823ca1940ca5aed. 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/QZHNA2457428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557cab20956d123600079e8810f1cf26812fc1a55b96b20eaebb486d569c8476. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/QZHNB2401048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b35a085ec2b4a472e7348e06cdbfe1e0dfb925f60f442fc70f2160c469e6809. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWZ2489995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe748ed2ffcab309d446d8f64ee64c2363d1b6d20d1ee108f077414e4228b0510. 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/QZTB52411718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc7a31d9b97b7ea6bcfc280bf6b95f95ed03a29e51ed46adb52af65985cecf7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWFQ2491003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf70d0a0a97df6ae4902d27281cf952f87d7104a30c899d2beabcb56cbf1ff99. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ7S2449456.