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 0xdaaa40ab9b679f77e49c5957e9fa6c6428df6c5c6208ac430ec4de3bd5c6afed. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5fffcb3-6ac5-4ab0-bf79-2b1eea760688.json and https://artists.proofprofile.net/proofs/artist/d5fffcb3-6ac5-4ab0-bf79-2b1eea760688.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 0x235205df4971f885dcfaea31c36a3265b72f489a504ffa144f742f11c32c3766. 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/QZK6L2288164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e48346a3d44beae464558857661aefc46ef6752f2f6ab3959ae0f8cfe41156. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:06:39Z), 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/QZTBC2369619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce35a35816dd962231c0d7309883133132f8f619f52e4fcf19071df2106aa5b7. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZTBC2352110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94f25dd61fb0b3e781ffd7f65d3021150422982b6f5a50b9cdccffba0c6095a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTBC2352112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f18589e0ef567eb90dad89bf1409c11a02ae5851d43dea4e0509d7ba464400. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:58:51Z), 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/QZTBC2352113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41ca8de3a1059b808ded67a7b90bee8c1e15a16b82b8b91c23f0bd6b1bed14b. 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/QZES72507350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d0243c799f38b229fab1d1b8d108a0df361203b5bafcf171c27c59485a4a97. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:25:22Z), 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/QZES72507351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcee7bdb39423dee449f91b49bbddbd362fc4f51da1b3886062c299d71ecd2ed. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZES72507352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5b9153583286afe8cc3b7098412ed2f13ab9315d87e00a613bfebee141ccfb. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:30:53Z), 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/QZES72507353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e49eab449d90a445852111cadfd8c9620144ca589a74131c10e7ce09c9c39ae. 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/QZES72507354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe790148dc36578c97ba37d989839c94c1fa5e2f14a5c81d196073dfbdc1b7ca5. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZTB42510899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136e985625a00cb7ed225e62bdb1bc0901c541442d3de5271f993f4c24378629. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFL2593383.