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 0xb4b18058fa54319223a54ff0d90c6da588808005d3c5255a5f63bb278107be35. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efb19800-25da-46ad-80ce-4465048f360e.json and https://artists.proofprofile.net/proofs/artist/efb19800-25da-46ad-80ce-4465048f360e.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 0x3bef30ee79d78ee7d0bba621fb07d0dbac37b8f105a93b2c01522e45d6fac44f. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/BCI5M2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e6641acaff038d40cbd7ca5ea10dc39c04360bd20fab1ba42032d2b21c190a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BCI5M2500161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0cdae36599190aeb019a35ef8e4ff1ee704ec986cb0e234e00dff4b6546d38. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT5M22553537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2da65c26a2a3bf86f5b4f7b2048cc55d0081afc25d9699c59e4e7b0dc0cdcbf. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:52:24Z), 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/QT5M32529959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148bcae06aa4267eb20c2b508c1e7706cc13d03e18ff61ec6dbd19643c9e6aca. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:07:38Z), 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/QT5M42585886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd46a8e4ff06686f99ab1604488f9919336dff3dc80d6e10ef5ec8a4e31efff7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT5M42575449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680b9ae50ce3f8a17907c30dd561e9955ac91b49a10815f1f2488c42b92c4e06. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:53:40Z), 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/QT5M42503302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309635b9ddd19d5e275ad130ed17847257c7152fcfc557288cd44b8e09a1b019. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:05:58Z), 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/QT5M42504761.