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 0xfaea2bc390ba70fa3cc7dc01e28f7313801abee455582f2057715d00c07a986b. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4e2eca1-8d19-467a-bfeb-12a9e0a327e4.json and https://artists.proofprofile.net/proofs/artist/e4e2eca1-8d19-467a-bfeb-12a9e0a327e4.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 0xbe35f164c229f81d5b334be7faccb06ab7516e4781b906f09ca9fbe4fc9327a3. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:24:02Z), 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/QM4TX1835004.
El Sentimiento Con los Hermanos Arriagada
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693e30fa106748194acb9dd91336cb3072e442379b8254e9eeef5888a609fbf6. 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/USJE61707301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41b7d706d365e9d60dc815ca6f359009f3e33917f3b769bb4bcae3123532bf6. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USJE61707305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c010a34c59a527bb91558366f78b8336e6751add345d854f98f34c69347f407. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USJE61707307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ced7f3092cd70c327741e010f089d9753386ccdc64d687f02711c5ce75307e. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:39:39Z), 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/USJE61707309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884839de7808479cbd17ff7ea4f78a24036e0abccad5524631182f7942ae29ab. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FR2X42068140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884839de7808479cbd17ff7ea4f78a24036e0abccad5524631182f7942ae29ab. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/FR2X42068140.