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 0x2c0b670a02fef248799e9030f85bf21ac3b9d7b2f6324a933f3fda69f47e9fb0. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43282a39-6ee3-480b-af11-c6d2dcaff648.json and https://artists.proofprofile.net/proofs/artist/43282a39-6ee3-480b-af11-c6d2dcaff648.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 0x61ec32f42cd0e87d6eedd14bd4df9e5354f7016ca752736161bbc2fd9c3fa3ee. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:18:06Z), 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/TCJPT2272956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dcf69b0ffcf0e12371addabd36d3f90f7ac8c6c5caba36599e8013d85bbbca. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCJPA2471271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad30322b7ae66b3abed9be9853a67cc750e112e9762175ef16e15e1d4b015f6. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:06:57Z), 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/TCJPA2483890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09c1f82d93def197c863853d250ca63eeda62553fcc91cbe1b9b1c470a2e717. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCJPA2485361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dcf69b0ffcf0e12371addabd36d3f90f7ac8c6c5caba36599e8013d85bbbca. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCJPA2471271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3dea9bb7879f9b3368090dff82118dd45bd6e6ed346ae1f956ab717e5204ad8. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/JP92L2426990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7992774d4f573817e0daaa438668992536e40853102e11b2b61167a5a8601bd2. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/TCJPG2554713.