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 0x299d32b25d0fc57a474f6f93a9f5b91ea7834bcc535c11d19bcfb69553f82e59. 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/f766acd3-1155-4adf-a2cd-fbe475eee2e2.json and https://artists.proofprofile.net/proofs/artist/f766acd3-1155-4adf-a2cd-fbe475eee2e2.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 0xf3d39039760d6aa7cbdf90e999c29e00979e34181113357c5ac061803f7d3b02. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DKT271900201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc36c3984a7851a0c14376551865139455efc8bb5143202dfb3f9855dc85997. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:03:42Z), 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/DKM6A2500205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc5e3d00cb44dd86e7f738139b99df669dd4667d6df5e0c6ff96ce2ed033d2c. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:33:14Z), 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/DKM6A2500208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fbe6984c2385cd2fd0914030761d82ecbb2f9e16a2c1dde1cd77a92d0a322d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKQU2054138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e9f8899c64c19d41a54c98b4d28537e97dd5a8cfd598bd76779574b1b40261. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA6D22100841.