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 0x8f16d11ccb199f3c39b9202d6bc7ca8598f3320e5c630cb65b0e8dfe8ec49b64. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ba05b59-438f-416c-9cb9-ef6b52ca214c.json and https://artists.proofprofile.net/proofs/artist/8ba05b59-438f-416c-9cb9-ef6b52ca214c.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 0x0cf83022474d54d6f734cf682a2c18827700ad8db85ef8cb9163adda7b661152. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:41:30Z), 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/QZ9JZ1757320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3686268e485a629cb6bdd612ecfc1f9f88a11ebdfc86b0e2aa69f03bed00ef32. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZK6H2495297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b260278faec5ce9867bd3a137b5588d3875e4f07dac9144e4141c16ef9fbe7. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:59:34Z), 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/QZFZ62547953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57cdc152ebc0a8a2f6c999f2fd3bd163605c7f35740a72a15d7e7b0f21862d1. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:47:52Z), 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/QZHNB2555030.