thumb|Ritual devils and townspeople participate in a Correfoc (firerun) at the culmination of Festa Major 2012, in Vilanova i la Geltrú Fireworks are low explosive pyrotechnic devices used for aesthet
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 0xe4a22569d22345dbee707a60089b1858f52cac61222ca5a611ab2eaadd6da730. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b28243ec-0f71-43ab-88a9-55dbed3d3e56.json and https://artists.proofprofile.net/proofs/artist/b28243ec-0f71-43ab-88a9-55dbed3d3e56.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 0x336db6546487f234d75391a822045d1e8667a888dce70f5065cfa0aa2b0b7ae6. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:34:17Z), 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/CH6541624491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3309f2be0424ca840893ace00116b1e52350420b2fa79380b31b3cac0546350a. 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/CH6541624493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc6690289b4e795f5359fbfe1776ced5298ac4d9afa678fe5e869f4ad05c41b. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:19:39Z), 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/CH6541624498.