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 0xfaebb41faebf49f99a24b66876d32d050465c586293634e1706ee7cf67898ed1. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9634a2db-2e52-454c-b0e0-0f27f90e9ea9.json and https://artists.proofprofile.net/proofs/artist/9634a2db-2e52-454c-b0e0-0f27f90e9ea9.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 0x960bc21740439b7b5878239a013e4ca880bfcfd307b20023ec4de5fc0a2ae684. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:28:58Z), 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/QZHN92077812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf73cfabf26ba64e0940a340c5a9f0177fa2fe6a4ad417cb6da40739144f4188. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:27:03Z), 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/QZHN92077814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11913bac548eaca04a7931458f367c275acd68096f564cc6f270a09f7984694c. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZTB22274062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa941fe656276fddd3d00e888d38972113fa9aaa4b0f17d11461858bd9fe24589. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZTB22275656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d227391947d034747ae4061a9653c52cd6b2d9d6d749f71ab56420e39f17c5. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:40:41Z), 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/QZFZ72321744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c7bb53cfe76939e9e3e8ecfb304694c891d9646e0873d933700d4cc59fc0a5. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZFZ72321746.