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 0x85d0fe166a56b1648620901c64994d89d3bad0d4505e8d99a22fd1bda769b19d. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/291309f7-f269-4c1f-b2dc-15ee33028d1b.json and https://artists.proofprofile.net/proofs/artist/291309f7-f269-4c1f-b2dc-15ee33028d1b.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 0x0ce72e76cd62165a91074b31136f21bdff40f1d92ec55b68fd0c48f7ba43c012. 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/USA2P2124577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad31ac87028455716f577a9ab3fcaecac6eba4c68e73b49ca807bbf9c8bfb8d7. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:17:52Z), 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/USA2P2124580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b103f08e0dc2bb0e6d5a02dbfcbbbb35a8de56b458964c1d5f4e17d9a2121c. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:36:49Z), 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/USA2P2124582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238c94b2c2beabf6f3c69d76652c074df3d2fb6d4ed5f9d77c51a3d0aedb0188. 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/USA2P2124581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8da597bf23bc52b218c85782ced6bd9ef4080fdf61f2d54d43fd338cd52b6c3. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:34:34Z), 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/USA2P2124586.