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 0x00255401e021a3b8bb3122bb90981c2f927356e3c72815caa3a631fd9a8cd06b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9a7b050-273d-4a7e-b041-30241fae60aa.json and https://artists.proofprofile.net/proofs/artist/a9a7b050-273d-4a7e-b041-30241fae60aa.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 0x86d54ec75e937c3de2ef82ee36512ae12e171227989a1a5dde34ca8848fde730. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:43:46Z), 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/QM4TW1779708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667b2aa33d2470a5fb2b003afe2a6221d76ed4ff0d9ae80583a14111c7a6a890. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZ5FN1816433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b64ac6d96dc91215624cab2a9243118f24ff896558bdf163c49a87764866bd2. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:18:27Z), 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/QZ5FN1886828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c99bdb6c03a3e59b080bc04f140d53632cdd61cf2f26999e521c075c18c14f. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:36:00Z), 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/USY252004426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1843d44a62fc4a0da8c519971fde089faeee6dd047ce51979f9baa56a5734f7. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/USY252004427.