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 0x4c83c0c4d44685db38b104e0d9969afc1991dbd48ceebb3b34094afc54fa6d19. 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/f50f0810-7aa0-4f58-abd4-287b30786879.json and https://artists.proofprofile.net/proofs/artist/f50f0810-7aa0-4f58-abd4-287b30786879.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 0x72132eb8c091cbca314a4ab25cbce6ced27861a9882ffe9d41301e65a9bac4d9. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:28:33Z), 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/DET190300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc4c4414e947ebcda2a02f72a6bfee3f288f952316fe9e38885d2821cba1a24. 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/DET190200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c14eb296f5c7b1fc61b77c388085554771daae89fc35e7fe56d4fb9e11fbee4. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/DET190200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d17939fadffb56559ffea7cc2d1637e8ba366d5cb0694f3a2ebc41c7a5b6ebe. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/DET190400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18cdf32d352e33d023004bb11d67284faa4c62511d3dc4d33729d8cd0201ac6. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:08:02Z), 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/DET190500435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9decbbea18f0ae1259a4daafbd3584ef2d92b537d1804ff14142046eb546d24. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DET191305601.