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 0xfe23f0ebf9222765a3295342e77d62beddf5922c136a3c41cdf3e827d19f7dcc. 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/837c1c82-5e50-4e86-b0f3-82cfbeeceec7.json and https://artists.proofprofile.net/proofs/artist/837c1c82-5e50-4e86-b0f3-82cfbeeceec7.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 0x7c7c19f7e3bf0a7fc53173a936bdd956e65f31dcf2cab5a1d018283eb5b37590. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FR59R2304707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7c19f7e3bf0a7fc53173a936bdd956e65f31dcf2cab5a1d018283eb5b37590. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/FR59R2304707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909fd6a4b18e941538a9f68e3c532f8210a90d447c36b71c4e5ee059c3b35fd4. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:46:47Z), 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/FRX282448611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f623952070a6395600aef77361078c07dfc1b77f85f1d8c0a07b532bf4c1ea. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/TCAJG2565992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe67b12c79ec95617ac1c62db24c2ed621dfb8b4f327d38cd3345c1de8d41c86. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/ESA012574636.