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 0x92f780cb70562734783043f855d486c571974da0ad7ba4a1f0ab66022f8adcf2. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b14d1f4-5322-4b93-b725-8dbefe68b6e4.json and https://artists.proofprofile.net/proofs/artist/9b14d1f4-5322-4b93-b725-8dbefe68b6e4.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 0x0f3443257de531209f64399ac99a24c934ce301e2869b162e35cb46e8105d567. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:57:49Z), 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/FRX762554888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0358ad83ba5d028d4cf85297cf6dd421bed89e8cb07956d031a739dab47afda. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:56:12Z), 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/FRX762554885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0358ad83ba5d028d4cf85297cf6dd421bed89e8cb07956d031a739dab47afda. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX762554885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c28fedf354f43c5137757c783b5890a15a505e48f9d6f03794e8a7ea8a1d5f7. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:03:50Z), 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/FRX762554886.