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 0x4a6cb19c41c3a8fa902ea13cb3e1d00f65ecad756e417c03bab1eeb35a2122b7. 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/c303a2db-9599-4789-bc80-a17c56d230a0.json and https://artists.proofprofile.net/proofs/artist/c303a2db-9599-4789-bc80-a17c56d230a0.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 0x55744be1c8816a93f4c602df12ed86d0c4f125f55f38cfee5f71e777f4f996e6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR2X41665216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf790d72a08f5123ea8a727bf915f052dc07c8ab009f1a72d5c5d1eb82330859. 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/FR96X1661876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bc8e4a83a1ba77b4df1a5d600504dd1cee71bf4dce435983613aa18fe08373. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FR96X1661878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce38fc2ca0dbf026f65ac5d7cca580707ea7bd69919affe956f87948b97308e5. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/FR96X1661879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a36eb12aab3e021a8506aa07ff1299390e82bd8c0a7a2aa5057a415b6d27c3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:41:27Z), 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/FR2X41665217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5faf026425da53dd276125b46ee98f20f4dcc4d00e6fa670fd2b7401ded04ee3. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:03:36Z), 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/FR96X1661881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88215bb9de2577565ea887125ef6240c11d53ade65d33f39d7088d96b394b57f. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/FR96X1661882.