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 0xfa02af879eb3fb78834a9b2884afcfd940193ea88f62508d3d605185b01cffc8. 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/7caed9ff-7ae1-4c19-8766-c7d9c04ce0d9.json and https://artists.proofprofile.net/proofs/artist/7caed9ff-7ae1-4c19-8766-c7d9c04ce0d9.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 0x80ae831f2ce8e4df681aa95270597216a1b6e9acd3ec6d880e206ef598573f02. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:09:49Z), 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/TCAEN1929816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0135d84f2cf39f6d8e6a0a6cc61aa46755bf0255062b35680295a7617d14837f. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/TCAEO1988546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ec736706649d053647ff12202dc0c772e6643f575bb5a11c53f5b90cd6d1c5. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAEQ2001675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c5a15e56799da8810bdc760ab2e3ad3c8db39faab69065bc6841a03fb5a687. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:07:06Z), 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/TCAES2080527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5b9cc2a0c89b6095d325c6445b96fa668809cf673013875cfa30772d02bd1f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAEX2049838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916dc2ac03ca4b908a9a586c33ac148c521179e6c15703368cf1e1cadf144609. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAFK2160949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a89f645f0f61b274636354fed6634a905324b0d90bc38139e5f77af513439ac. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAFS2110235.