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 0x3172fa5af77b03e893629ca26eaad240f534d039e362f553606e1a784a435cf1. 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/5305d9dd-a664-45c2-b599-941b91adeb21.json and https://artists.proofprofile.net/proofs/artist/5305d9dd-a664-45c2-b599-941b91adeb21.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 0x79bf1cb0bd04ef11adcc91546ad2e97f7ad9b2cbe5595bbf6305e78f3f5fbc0d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM4DW1592146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f54a41ab0a776d5ffe7c15fea2ba18a8028eef0aa6dfd80906b8056ddbd347a. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:44:07Z), 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/QZBRF1839642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e20f5db5694162a4e6fa54553dc765dda8f5d4607c02e204fcafe33e94b54b. 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/QZCE61851443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452859459fe27eb5200b8825dbe9f47dee31326beea7ccc2691102ef9df086d1. 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/QZES61918194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed5eb16934654c285bca5ca16463db201b06f47e2b5353ef1ed04f53799198d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHNB1984157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7137f497c17974c2f74761379954a39bde98489a7219dc96c600d795a1f5b07. 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/QZ93L2025299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c517d28a6c93c7990d654b82ea4d49e69304b26100b8ed0f20cecd6d3dea7f5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:38:15Z), 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/GBKPL2164943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46242d326b30ae32d229fd9573c51882aaef62c2a0d316e9d9c7df8dba75b333. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GBKPL2204881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb11b4e1f25d384c7e297d795df313aa9ae116feafcf29899f3cd749617d46e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:11:54Z), 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/QZWFR2389246.