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 0xfbfaaa8de91cc63d342b836027c8924d71e1a7f3e31a8f7a41d0c5ad9d74ebda. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4765a08-a80f-4c4a-8543-91150eb1ec59.json and https://artists.proofprofile.net/proofs/artist/c4765a08-a80f-4c4a-8543-91150eb1ec59.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 0x0ccd995c94119848f063c8383d12f7b98b6e89d03c4c0b1aa95980d8ff501f97. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:38:27Z), 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/CA5ZU0800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62fa0360d0bacc3dcfa806b729cca0304e4f660436d2e7ca6d232a36fdcbe67. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:29:16Z), 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/CA5ZU1100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d9c874782571d80ffbd4553c53629a63e8e946d5ffeac3c0aceab49ac4e6d1. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:57:44Z), 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/CA5ZU1400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc2df5b26bd56cdccdad3f36b444fe3cfc8f1d9ef1f8bd22688ba45b93e05e8. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/CA5ZU1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d50f4c4797dabec8083f5110f81d5b55c9bf4f075c4fd8672fb4f5f4bfb7f0a. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:11:28Z), 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/CA5ZU2200002.