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 0x2f79df19aa409a7cc340270f6226cea77eadf0736239697ebb32966d15043af7. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cdb600e5-feec-4c32-9f5f-3e1215912ea6.json and https://artists.proofprofile.net/proofs/artist/cdb600e5-feec-4c32-9f5f-3e1215912ea6.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 0xa35883307f91ebf19b373306cc718d2e44713481e6ef2591137157ff87696f17. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZMEM2388790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8126ee8fbacf586a7c0b617e60b5d3e722e87bc915bb5c87a852e973cfb24e4. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZHNB2429431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0476baf64632f616b38023a71fdc42e8cef93daa2082ca25bb73771c6748749. 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/QZFYZ2479417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372fc9eaa541eb1462c82116063e6f6f44bf16962feb5c607aea332702d54bd8. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:43:34Z), 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/QZTBF2476133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bf58ccecd5dc08ed62459bd7aa265ffb01fa4d629269956bab5490b066a436. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:29:29Z), 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/QZTBF2476139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0dd1c734f9dd908f0f87da22e5da6af63ed2131b5af510733cb8b1037650bc1. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/USA2P2476983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012d73a4d95195bf7af9bfd60dad64088e95516afcd98ad9e8d8f23238c72660. 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/USA2P2505969.