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 0x5cccebc4d37c614e746d5974fa8356f0bc44ec68f64a792c345110ad62fe9629. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1bc7ef0-e57f-4fb5-9088-5361888f3595.json and https://artists.proofprofile.net/proofs/artist/e1bc7ef0-e57f-4fb5-9088-5361888f3595.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 0xbd4d8862566cf66f2305788b1813989188ba4b0848267383078b149488130f4c. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:30:33Z), 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/ES31E2304395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c6cac467ccfb16b6d0f15e4ff3b31ae18f5ac0c6ecac6f51096fd4ad9bd89d. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ES75E2205009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b44708abbee9903e41389ccf41cbd294f6d6f6e658fdb357838913b775640f7. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:05:54Z), 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/ES31E2305657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2558cc46c1b40e8ad6f371274c53cf36ce6f12c101f00978e6c756edef337785. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ES31E2305271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a4272b776cd27ddf15590c839b54825aa635f93acac6c7ebe215c450659121. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:46:48Z), 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/ES75E2202305.