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 0x9945970c1900274611081077f8b19fa48889a4ee4a26512ca24ddb11169b6494. 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/e0cff5f5-fd40-46d7-a1cc-87734129f6b1.json and https://artists.proofprofile.net/proofs/artist/e0cff5f5-fd40-46d7-a1cc-87734129f6b1.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 0x3e02f8d6ccaf6f2f5ef61b72b87681ed7291bca6abdd086e45a612cb57d359e8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ITM819412604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106564011d1a0f4130d30560fe81c900b5c6c523d05f329ee24e6f388f3f2b45. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITM819442604.
What U Want - Chris Stussy & Djoko aka Kolter Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cf472c8167c7f82766601bdb0b08c8f47595eb970634b08929c478201da81e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITM811912811.
Inside of You - Chris Stussy & Djoko aka Kolter Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bfa161602ad59e7e0c2f498ac828f671877b057aacfca87b15299a8c09a5e6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITM811922811.
Reissued #4 - The Ultimate Retrospective
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c383142aa0bb731efcacc022c74f8ae506ac9b4f6d27c4fbbd8da0e6238da2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITM819211403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4122cb302bd488abda363fd9639a7b39c764913e375e6df0251af2bdfe64bbf9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITM819100310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9067719ae301111c1f1b5c37ac9c648624025b2ce7c0c2a0c19446f4bf66b47b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITM819530903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9c25dc6c71449d59dcc9e5c82c7e529fad78ef0440bfc934a6f0d285a01597. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITM819431403.