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 0x771366a01226fb7411388ffa4a9921f3652a975f746d92173088975aa696d97f. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f3e8b6b-2693-4622-b35e-2728d50aa450.json and https://artists.proofprofile.net/proofs/artist/8f3e8b6b-2693-4622-b35e-2728d50aa450.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 0x2016390d5f44e9ba0a3a63337067d1d3e5173f4c19a14377bd1d0e7a2bab8e9e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:38:22Z), 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/QM7281466138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13750a4f57722ca3f3f4f024a1e0ede2cce3afd5126a7e5b17e5ee640fc21db5. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM7281466141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfb1948dcdf1c3e9e70a88dfe73947ed94efee8f04e205095ad287b40460dc7. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QM7281466143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d072ee44cd684dbc5427d42adcc8b26e98e2cc714d70e5159dd232aa0fed80. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:41:15Z), 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/QM7281466145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f71701c6b6df729af0e3b236ee401cc3cf5020fc3770f50a983d71bc5f34fa. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QM7281466146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9fb3f1afbebdbdc984d0213825037190ece70296f77488737cec6ab0d601b6. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:29:36Z), 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/QM7281466151.