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 0x08352d7a61f680dd97a52f12976a2d82a06faeb39e6416a03b4e8c4664b6e101. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9fda5fd6-db24-457c-8dd5-3a962a03a493.json and https://artists.proofprofile.net/proofs/artist/9fda5fd6-db24-457c-8dd5-3a962a03a493.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 0x970ccb99bad6e892670ae65a1706400eb1d5e2928aeb0d1ff47e1b528a819d5a. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/QZZ7Q2419621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba1e60af77d365b08ce78a20cd2adf8c9e0a0c1f9bcf75bf0ba9c8d023bafde. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ7W2407798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d0bef02ccb6be0fffb36553a3b66963d7cdeeb4200318a15fadf665bf0e09a. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZZ7W2407799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f735a2db989ce241848b847b613a62491dba0fc6048c0de9ff9b4117c88b27. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ7W2407800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6052ca6e90bb3d1b43d0cd284e0af5a3fecc89b655d02e7f69ad8780f66158. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:10:49Z), 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/QZZ7W2407801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970ccb99bad6e892670ae65a1706400eb1d5e2928aeb0d1ff47e1b528a819d5a. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:08:57Z), 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/QZZ7Q2419621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665b0b1c27a19ad50208032d6bd7240fa37b14fda777782ffcb50517ceaa3041. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ7W2407803.