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 0x68b9af429d290864bb89f08b898086053f096bbc842b81afcb1ac499b217ab78. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd2888e9-cd4d-4ece-ba1a-1d1e3af815af.json and https://artists.proofprofile.net/proofs/artist/dd2888e9-cd4d-4ece-ba1a-1d1e3af815af.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 0x91d9fe37e6dc63837715dffc33c189db387071b2f23ce96390ee437c6692f034. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/AUUM71800970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e216f3224009fe9561d24f6353775ecd6ddf57e9367c9f1a9092a3b2557299b. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:42:32Z), 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/USA2P2100160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa484360bfeee7d843a96024c1ae4f2a2a5e2e92388ebd472d20fe4b56cd0ad51. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CAN112100191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7ae536462379fc68bead87bb4b82d2e6f490d544887364214b22d819b11626. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:29:13Z), 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/CAN112200965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60da58f82a9b9e8de410f6cc1316a42d77c0a3da2b73191a86914685d2c3894. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:59:44Z), 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/CAN112300133.