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 0x7a72ad5d7355f4d8a76f4d072fa1c67912bf4ec341aa57d44d5e76e5d6790a21. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e31266fa-7006-48d1-8688-6d292084de99.json and https://artists.proofprofile.net/proofs/artist/e31266fa-7006-48d1-8688-6d292084de99.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 0x904b8f3b31bd95bb1dbcce0c7ad55f74dc028fa3cd34aa8d2fbfe5828771df04. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZTAT2386213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6a5a0b14ed99c89826e2cbbbcbd3e3cc23d54aec39cbf99f1cdd50c70cffcc. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZDA72342160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8d12baa1a81c81f83cd2f89dfc18ec959ca4b657958db282e2b9e25a3e93cb. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTB62317883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5708c5abf4eb810ec1f5131e572bd711164d14036ba4bf7ab025387836b6c55c. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:59:38Z), 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/QZTBA2384912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a1a4d6bcb8683de06cc03ede42b2182eca308fa2559eed749126df6b1ec75a. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZFYZ2426101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeded6ea5653c87b798f3805c1c935a974f484a5d719dad401a1b5f74eae0d525. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZHN52441819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbfda6a62e4b0390553b1507cb0f1aa8f4a7f14578e2af8a3b5a57ec1da57e8. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZK6F2491014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d83c6246fa0d24eff6437e30126de24d722cad2ac0745f69ed8219805922c1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWW2463853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba9df9208a1548f3badd47393655ad0d828b78aa653df2be2820af82efa249e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWFU2462603.