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 0x90073323294a2fe4bdaf53f73886739be96301e9b2efcdc3a0306d0ed10cb3f0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/670c44a9-b19d-4371-b714-7904a4496b21.json and https://artists.proofprofile.net/proofs/artist/670c44a9-b19d-4371-b714-7904a4496b21.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 0xeba1c04e3374402e5b11134467a855289e532c699a21466cb492a60b9baf4385. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:06:11Z), 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/QZK6M2174825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab90f7e4020deb1e4fc7963e01c2b6e3135c6c2771184c73db6b67e82d414e2c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMDA72438998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85926aa335c7c3cff0a3292a78a648fe723decb8851561153dea9a48c2a4f18. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:11:49Z), 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/QMDA72438993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e2c6ae0d3073c394d6800a4ea3ca110f0af6b61c6b7a2e62d472bc1ca2a4d7. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:02:40Z), 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/FR2X42488280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23162a8a2d76d92f3fb085a096e5665a33eb2546549d45f7ebcfa375eca7a8cc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMDA72438996.