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 0x7deee97a81d9971c280d24119de9da522981fee7cea8964df1491f5c5646181d. 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/3e223cd1-748b-4fe8-8f79-dbab76ffb785.json and https://artists.proofprofile.net/proofs/artist/3e223cd1-748b-4fe8-8f79-dbab76ffb785.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 0x89a9b9f2634191e6277271995cf6111882f726b812e4dcd4c04880be72a07470. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZFZ32208132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7897089c15c5b156213f494fc97c83d8a30e7914a4973887634814ffd299b54d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:45:11Z), 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/QZES52219339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618587d24c00df1f878c1af97742c23a02e79ac5c17685eca8a4445efe62e5d3. 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/QZK6G2216284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8093d24beeb6d74a6475c2fa0f4ae64e480a6a399b786640d292753b5c4d816. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMEQ2277004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3310f035a2f6d93d586e13de2d043a8a64c798397be81c04bdc2162cb5bbfca2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:23:27Z), 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/QZNWY2239691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389c2dbb45db6fdcf817edf78b9df7efd7ccc8b85a1272dd5494204adb687066. 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/QZTAT2202133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19c13f6f3c6281f91c1fcf6f5ac7d799d2b0953637a56ac70634a90c8bd8bb4. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZHN72303416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643a9fa339f5eb3d5cb56c0457a6da0b355c3943ec83b39f6ec766b0991f6462. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZHN82318922.