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 0x3f8445d14b63b8fabb21b55228f03e543c676fedba7bc250b19ae2ef643852c0. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd78202b-bf71-4435-b8c3-193ee949a318.json and https://artists.proofprofile.net/proofs/artist/fd78202b-bf71-4435-b8c3-193ee949a318.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 0xc86f981b79fe34b7c9c7a6ab1532f3add753747cdd437ac06b4929c1c4a2b372. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USBL10200336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d3417312f396dd84cc676be92dd6dc41a01491f4e2077db4f5dd4487ea0442. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-17T00:12:40Z), 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/QZDQH2005043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661d0d6f474e3dd93038ad59641b091fbc80a2b4a94094979232dcbe72f83740. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:25:14Z), 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/QZDQH2004752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94554cc30011d7db3cca58b9a2714ca13f7dcae95ecc10096b17442378101148. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZDQH2004754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca9c35e71caa92b4b88dcb8240a00402cb07eb115bc081b536678b9dc022585. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:53:35Z), 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/USA2P2352025.