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 0xca2f86d3c5d2ee2621ef940351c7fdf2388cb3d8cc88089507bebf96a2b7513f. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8a5da36-fafb-4e72-8f58-e9c04c400be8.json and https://artists.proofprofile.net/proofs/artist/c8a5da36-fafb-4e72-8f58-e9c04c400be8.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 0x2c160daa91d9f58f38aac65cd1c751529f14e28d052bc8eaf3f9df20166af443. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWY2268055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe93535b66a173128ac8e9ac5bcc5be6a1cb3a8fc40e50ec3dfe2ca4a46c626. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:21:04Z), 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/QZHN62381166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7a9229c10d45e90cb7cdd029bccace4dbb337279e8d82db23ddf2a69364f62. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNWU2345723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ff2025bc4494c2cdb0cf524210f6e93199365d1b19540edd8d89bad0793e72. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:36:20Z), 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/QZES62423666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5f2804909c8fe86ec8b240ae12d561a995cf8b92224b2f54584058622c72b3. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:46:39Z), 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/QZWFV2473140.