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 0xb9810f6135631fed2e4b4d0d8e453aade7d2acc14a9cad1ef64b1b1b945ed1a5. Chain 2 (Bitcoin): anchored in block 953710 (2026-06-14T23:32:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e5ede16-084f-4183-9968-4f8c23e7ff63.json and https://artists.proofprofile.net/proofs/artist/7e5ede16-084f-4183-9968-4f8c23e7ff63.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 0x0b7545399fc0bdfc6289132732cda0c003d560701e21bcf21e8a54c6d9ad0b4d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTAU2451069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4330f2db60170d99165a913db3483036860cf57b6565a9f3407da54dba394606. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZTBF2453674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4ec0a918fc7a61ca2706a5531b5c20faea1f1c2d5f6154643c044687ed5286. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZTAU2451073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20ef82ba814b42a47816567cdb985a53a4a52d95a77991950f35361a16b9d43. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:00:20Z), 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/QZTAU2451070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5389719222febc2b9f878208c253d4d383b6a61caedc38eec06a2ea9f5c3e5. 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/QZTAU2451072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd996dfade49d48378125589fdccd928dd05453c6de4da83857f3be05d42ea054. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZES62592095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603affc93a29323eda6ba324118a849d8c7f2dc09b4691776b9c415d2ac5099f. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:14:23Z), 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/QZTAU2451076.