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 0xf8baf627950604d2128652fabafa24d4a9111cf0695d7f4e85edc1770e535daa. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2eea70b-05eb-4d9c-891b-c52bca1dd672.json and https://artists.proofprofile.net/proofs/artist/e2eea70b-05eb-4d9c-891b-c52bca1dd672.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 0xa03a7b417fa6326af1616c6f777f31cb5e58873daf374d29f6d0cf4cb9680dfa. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMDA61895542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8879b12fced611be11d42a77f8ce3f65deab0f93f521122865f8febcdfa151c4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM6P41806164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4538e4e518c701886f9bb10d24ebf655f2dd74f18f0cef5c6dfa7e0677c94906. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:03:03Z), 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/QM6P41806168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9f8b9fbfbe1f8e42ee8766da91f4e64ff6325cca024cbf8daeabb0d65fa0b6. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:27:05Z), 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/QM7281893176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf11718561be00104bc9574fab33382ce85c31a2eb67c448c45f79aa16f3c06. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:26:06Z), 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/QM7281902228.