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 0x1f35919422cf4de35fd32fe4890798355dd9570e22cd9eadba6a86278f1df45b. 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/f8a36487-2b56-44e4-93b4-03f7146393c9.json and https://artists.proofprofile.net/proofs/artist/f8a36487-2b56-44e4-93b4-03f7146393c9.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 0xe32fcb59d81f4529abfe60c322a267521a7eb4f99f617a6df2e413195a214348. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZNWX2597221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6beed983cf4c4e422e781576fd48cbedba8453c151753f0c8589fce597e6294. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWZ2512705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fb35457ba752b6726dce7408d6004c76818d0dd8e9fba52c157192b14db296. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:30:04Z), 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/QZNWZ2508839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeee531b3849feac6e6a5deb30dda863850876616ffdd8a8d90256d98d229cd9. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNWZ2524177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7d38e4cc4398bd05d23f6436821ed6bcafe8f5707d0602997579fe93b1c700. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZRP42532758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63619da23c4f04aeab9bf905c74c8802ba1f100d9e517806fe304e4227f43c3. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:39:56Z), 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/QZRP42530987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48b8c418d575f00badaef11be81509e3ff8fd95200c4b14403636bcc40eec9a. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:05:59Z), 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/QZRP42530784.