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 0x62c194707268b14fbb38ddabf3852a6c1253cf91eec7aefbebfde65573c7a068. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a723982-2527-4fd5-832e-cdc8e0e3500f.json and https://artists.proofprofile.net/proofs/artist/4a723982-2527-4fd5-832e-cdc8e0e3500f.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 0x9f534d7685f364a2a58e6a49015ed0532aa6b9c702aef1140f6a51b3525cdf83. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:00:57Z), 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/FRX872283216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc890cb3bdd9364e0244a7b15d10072eeaf324b31a3dbe873357d0c53e333ef77. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:21:22Z), 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/DGA052246977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6c9d3d12e8524fe66a25475a68e668a080c2c74974766baa9e2e7a61063f50. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX452324393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f6a754423a59c49c260072dbbd5c35860259c81df875854874d53771a67857. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:14:16Z), 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/FRX452324395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e3a4a49bbe57dbfbfe8bfebcf69f46d38ea6f4c63242a7318e2b0f8141a235. 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/DGA072416338.