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 0x248d3eb18fb44be4d6f984e5d1ec76fc76ea69887c98c5d604eaca110f9b9cf8. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b369be1-a3be-4bbf-b081-233e54cf5b41.json and https://artists.proofprofile.net/proofs/artist/7b369be1-a3be-4bbf-b081-233e54cf5b41.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 0xbccfdc3f99ab6e7a3ff171f4235c5fdddaa6afb283b3fd70a5e52a02647eefbd. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/JPTO09443480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4905635243bc9321ac2d266c29b24701cf9c13976b35fcc69c158c3f2752db. 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/JPTO09443490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992f426c0e5af83bdc0a9d58053ac313b4cf27a50479222a6f0c8483826fe01c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPTO09524470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9847b750c243876544f41f88365d2d26bdf87cde9bc4b73d332a8a3904e78b. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/JPTO09614270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad24d1ce622082a2a3041d65199d6f29648ec07c92dfd8ff9b3735c52b6746f. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:24:49Z), 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/JPVI00916060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd0a5499a44fcf055fa1b92486ac9aa2d724f0c91580c4df0f727b665d30ff4. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:24:11Z), 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/JPVI00916100.