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 0xdf4740b5896bf118296033d1c9baff8fb7ea906e4878e2966855f56aada5f7ef. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb298e70-6b2e-4cb6-81dd-d9e18c4c6e67.json and https://artists.proofprofile.net/proofs/artist/eb298e70-6b2e-4cb6-81dd-d9e18c4c6e67.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 0xe1303e2f4ea99c13139a3597e67493cf1e6833cb8b4a63708c2ebb89b7af4cf7. 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/QZK6Q1973955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20407ba64bf2046d9ce30d35ebf0e20b0632d01efa11f7223a08d4d0306d6fd3. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:11:42Z), 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/QZ4JJ1984076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426bf98d518745c4f054e5d7d576e01eae9931d531619279740b951ebdf6c106. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZ4JJ1984085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16226dcca0fe7d552b6401718c55f8e7c6b451e2035c534cb7b0a46c4804cfb. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:05:10Z), 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/QZHN52035695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a1b0146770598b55d2b870ca2f33dba5f18e155dc5ae50330e29c5db234497. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:31:46Z), 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/QZMEQ2099068.