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 0xc82717c7a03dfb8b360e1dd461d47ab8cc84de24d3829c370b87178bc8d10ed2. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd298470-fb80-4783-ae1c-462d52d26d1a.json and https://artists.proofprofile.net/proofs/artist/fd298470-fb80-4783-ae1c-462d52d26d1a.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 0x1ce28c1c1bbbd2eec45c35fe32a5c6d8de445316021e346d4e1c46735c119dcb. 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/CNC021100117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbf649788da35e65313b0844fccc6b202821df4c946a271901346356d708a1e. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:33:31Z), 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/CNC021100124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f61a4e6e89fd8b08285badd05c8f51929455b0874c43f88062565b95d09d9b. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/CNC101300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedeaedc8bf9041624db2d1ec2f1c3adc036dc4a8a174498f3d061a977032d73. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:39:15Z), 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/CNC101200228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3312278d6ed387d5f21ec55c0f7932ec9a7e0dd248231835901c177079b606c0. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:09:52Z), 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/CNC101200229.