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 0x2f56ebcfb15fd979f560f914be2c53f6c3c953c8cd8473c82e1ca44abd8d3e8b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd172322-dc23-4657-9355-ca13d1b4e1a7.json and https://artists.proofprofile.net/proofs/artist/fd172322-dc23-4657-9355-ca13d1b4e1a7.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 0x60116c3206a363348bd9a606b373c8dea2a9be23eb05995d134b214219065d0b. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:38:38Z), 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/FR9W12017443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a12a0e7e1e6eaa8e89654838079ddf83afa0e120e44d89e3b10576f57c18702. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FXQ892200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e364c7e2428fe3472b872e256db2c739983dc0c0271b4dd8aa30886028b15d2. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:30:17Z), 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/FXQ892200468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99d39c518e125392537efb1d7f4038f8dbd4eb1eb5e42c2ef3f31b2f10ecb02. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:34:53Z), 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/FXQ892200486.