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 0x6105735c7b4cd9f16338b4a399ba604488ed82eba9fadc0266b53ee8fcd72fd8. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0a486d2-2416-4108-9f80-eefc476919fc.json and https://artists.proofprofile.net/proofs/artist/f0a486d2-2416-4108-9f80-eefc476919fc.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 0xfce0f4413b820bd947bc64fcf9d1e6493c7f48f3f3ec849236e8a8b379e556d8. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:19:45Z), 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/TCAFR2107359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20af0edb8b37c76a84096b99bb3d1e7c4bb2b34f931d2cc84d68ac27fe83af1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAFT2156312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb3850c40858906c6a0d1d85ee5a1d93de7fe78b0e6bf1933fd7b1a273015b6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAGC2272928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af7489c5867976f2d61a2d6771e6da704e68d986106fce2e2fd01f2ecdd72a3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:35:01Z), 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/TCAGN2228299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b12c80a2f328ff6af39a8429f801d51410c4192e4c2a7beef1c92ca41fcc8e. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/TCAJF2558621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550a43e0553e0c3dc0991254a6cf8af6b6a7139d43c086710ed3ca0a8d4ecd67. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:32:44Z), 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/TCAJX2581460.