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 0xc7f72486d8ea6d873358b1bb2b3147203458d8b4f8929c37de95a7bb8416e03f. Chain 2 (Bitcoin): anchored in block 954588 (2026-06-20T19:15:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba108dc7-ba31-47c8-a21d-10ce263b6df2.json and https://artists.proofprofile.net/proofs/artist/ba108dc7-ba31-47c8-a21d-10ce263b6df2.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 0xb59615794b8a178d663a80e92e47cc940e028f409161cda943cf7974fef28972. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:06:20Z), 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/TCAEC1953567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7957854182590414479ab83227389554f14059fcd378d77b0c26c6267036b185. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:01:09Z), 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/TCAJS2560604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d8519df9eac5787e1809dc2993e4d2fc5d60714d85474e15a51a2328dba608. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:00:59Z), 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/TCAJU2528300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc282274e3c5dc969e8923cf9e1f0e2e185fbc54def0b02f0f7a879878b9fcac5. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:20:07Z), 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/TCAJX2544435.