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 0x53c840d90faf08b1aed0d01a7483576f91272a5f729421c94b738bf2ee48d687. 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/2b4ccbc7-8616-4a1b-8879-d0fc6630dff9.json and https://artists.proofprofile.net/proofs/artist/2b4ccbc7-8616-4a1b-8879-d0fc6630dff9.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 0x0403ae20a39410df4176155e32f1afe4e05c6272867ec663f58dc62a324da74e. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:41:50Z), 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/QZRP42523366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744ceef0d7d4077c17ad59c79fd9db01d444de44c1ccdfb68103413040613af8. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZRP42523368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e3a488f2e24bec891631c83fbd9f064f693d8db0dfc16c78869d4e3a63c639. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZRP42523369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55b4922c389a57733e332357a98e2c77199348b4b0c83e694182df93477232b. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZRP42523372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf4ad1581295a75bae832479890326bcf907bb6f51bf832cd47961612f2fa33. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:47:54Z), 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/QZRP42523373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52fd9e9d1c71e97a7bbedb079d96e3952a9c60a97dab1bf008a9122adb0c5b6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:46:02Z), 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/QZRP42523374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43b992582e99f5b51b671502f33a7ee95d5059b4bf5edae10b7f50521658a8b. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZRP42523375.