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 0xccb76c5424e4ca4c67c586e4d66c0b1e26e5e394ffb89c34b2bc4864bd45b325. 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/daf0898d-8d29-46e5-bd91-a65255df1743.json and https://artists.proofprofile.net/proofs/artist/daf0898d-8d29-46e5-bd91-a65255df1743.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 0x86825376f691ee858bad8c4e68cade9a6ced02c39306b734575e4c02b34d08a7. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:20:48Z), 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/GBSMU6413444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457841b39be273701ee4f334b1f22443ca0caa5fff360a489bd7c4f74cb0580f. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:03:15Z), 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/GBSMU6413445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c91657d339de2042fa65d1f0b98eddc19a046cc897a28121f74d670de2919b. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:25:42Z), 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/GBSMU6604415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4707c9cc7bd651f7acbaeddce2ae8c79a6033ef59b6f6efb3d64aaad118bf9a8. 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/GBSMU6604416.