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 0xc020f501651c92151b8a19a0119c3352ebf0563c2d8c0eaa8cbb14ed39b1d3f8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/431543f9-df23-499b-a4aa-834d869fa239.json and https://artists.proofprofile.net/proofs/artist/431543f9-df23-499b-a4aa-834d869fa239.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 0x0c4e5d95cd1204facf464798e1ac388c0171257e56f133fc31601fd29be9ea8f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:51:32Z), 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/USA2B1103802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e074c4022973c2cf25c686e6a510839403f538293e2aa55a9cb9c2cc82fffe0. 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/USA2B1103803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c7fe1b38cd19d5e0dcb40ca0cc212b8e5d80d7089737cac34dbb536aab08cb. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:32:49Z), 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/USA2B1103810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754b744e785f28fb2ff9aa5181a61c39104a77f6ad619d851055fa1c57e268bc. 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/USA2B1512689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3a8b27e2d0329411f6e6c4458fe82f199d0876f18def730d3d6bbf1a603623. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/USA2B1512691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd55c3ac0c2d99a90cbe9133d333893218162647342445b6c6028d6e7ca4a42. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:55:29Z), 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/USA2B1512694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9d81bb9d046a2f62426a1dd3f52d83f41cf2e1442f63b052a12db4f980da1d. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USA2B1603944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6905b7d0fc89a040fc35e3d360e0e41fceec456ae396d132c518348acafacce. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:41:41Z), 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/USA2B1603951.