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 0xa153ea494d2a789b9f4ad38562f7b552022e960e7f9ad844df792eb2adb5d206. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70cfd3f9-67ef-4a82-8753-e7cb1c984c5e.json and https://artists.proofprofile.net/proofs/artist/70cfd3f9-67ef-4a82-8753-e7cb1c984c5e.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 0xeca8c09d4e3a759cc7fe59de91e8fcaa1737814af937e2b17f1838002384a7c8. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFZ62017974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e97785dc0d902b5b03b473e1e7cb8ab38b49e3ff68535a1d19b003614383c6b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHNC2012303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe760dd5afdd8c116dfe306df0343b63ed24784d62e356be6c4431db5d4460efa. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:04:46Z), 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/QZHNB2150869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ea025acdd9a3f4688cc59f2215c3662e5f9b7a667dc517e0eb32eb29fdbf4c. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZTAX2231429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438ef539cbdf1253d36dda5a2c2938687d1fc0e6f99b4565bf3dcc8f4902827e. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:16:00Z), 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/QZNWZ2382460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec6e3ba32e9353055b32dfbbc59078a471e2cfaab03802827a36310d5f03b27. 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/QZFZ72433560.