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 0x501134e94a5862417e15d57f1bcc796917ea4a1662426d12cb69db8108539b60. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a823b8c9-68ff-497d-b964-b5ef41f9df4b.json and https://artists.proofprofile.net/proofs/artist/a823b8c9-68ff-497d-b964-b5ef41f9df4b.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 0x5fb28e3162bdac3e88fe5e6590d0c62a395393f5f6a71310a0ca0f4ddee14a29. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QMEAX1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f551cf69bfe132b76744605675d43acf74737574e9bc7f802dd1c53b37d26c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMEAX2100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d10abe999f8838b11be062b33fc3e4c686b8a5c72cb0d67f2ca94f3df0dde04. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:49:50Z), 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/QMEAX2100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439542c5ed652500814b38db2ec02b28d101ac803efaafc6102c50ed4dbaf533. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:47:02Z), 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/QMEAX2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c4964675923244005c6e267caecb752e05f432aa9dcb6ed812937640d53cfa. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMEAX2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa583471b8bdfc56dbe0ea68cdb9a3e7291ff041eca18aede28f662f0577b0c80. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QMEAX2300003.