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 0x5ad1b1b18764ad680a41b50a2b31e3c7f31492f8f20dfa3ab2672c83503d4e01. 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/ae7fa0ae-df8b-48f1-91dc-32defdea3b2b.json and https://artists.proofprofile.net/proofs/artist/ae7fa0ae-df8b-48f1-91dc-32defdea3b2b.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 0x21c36c3115e788b33d9f647e851d901276575512dd5f3ce3bc819b00c94b5013. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZFZ72247301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0507390679004307474118376cc14c57616bc09f624347071d8e99579a3beff7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:19:13Z), 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/QZFZ72247302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbab4758d0bd8624b5234a06103a1c80959c64e1aa4f1f413777eda1d0963c6. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZFZ22254132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae27ce14460e94c68ad1f8824b06167a9a21096800712bb5e8c64fcf631cdd3. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:50:10Z), 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/QZFZ72247303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4da644332885ca42907de1edafabd82000da3eff7aad7edfb2545f89affde5. 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/QZFZ72247304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2722f2a33fcf16f4a984d5389a161916e0b0e22b0b4135d2f5063874424c8347. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZFYX2203314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30af51f023438e7a9cbac792a7973a9f4d99deee5c9dae0f08801a102ad1e041. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:43:08Z), 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/QZFZ72247305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c06810a9e2bb779a59e256eae0fef397b2321b1ba7ca87dc6b80fc95579f41a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH7812353166.