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 0xa539fa08ff3ebe09c620cef95f9a96f9d843c863c8553d0b7b9539687ecd38b3. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6bcd14f-a929-456c-8418-6efe5dd85195.json and https://artists.proofprofile.net/proofs/artist/b6bcd14f-a929-456c-8418-6efe5dd85195.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 0x599fea90ad35f03c5fd1e936309db5bcdd8d0d42f56f4da0abb08fe689ae00c9. 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/QZNWY2298428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723dcd22938c6ec701ea11115f372095a754e35942bcdaa3124170d01ed01c2b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6K2395372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4081dadb4e52d0763da021c2fabefb3e81e952f29fbdfb3a24f7f5be8a692198. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/QZPLR2343121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb216608997c062682047b8b5c38d61d1a496aeece9a5959cb1173d5da919cc. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T14:48:27Z), 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/QZES62449056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaaeeb0d9fd60cd18d0551e245fe9a2e55b2097a8401fc9358edb6422b9ed879. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:08:47Z), 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/QZES62449057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb219983c360b09a605a0f44e18229319c999862bfd2689d1db46e6efaa4b65ce. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:09:16Z), 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/QZES62449058.