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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a9205881d37bdc61318dfac66d913b11f3dcd3156308a092902fee9adba7f5. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a26b41b3-f410-4255-a3f8-87de441248a1.json and https://artists.proofprofile.net/proofs/artist/a26b41b3-f410-4255-a3f8-87de441248a1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Patient (Prod. Dj330, Gokudomvp, Sadboy91)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadce4cbca377c9cb0e2b8f6e8aa35193438781ecd673d8615abd7238216c0f02. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/RUAET2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d5807f4bd0938125eab959cabfb57a56977b0d45f300076cf12655cd29c821. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAIX2467401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fac280b4f2bce0bd2f7f9b7c36628ac5881cc5effa28c6e211b35dd1dfbb468. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/TCAIX2467419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc09a52cf3a361c04168527a154a6efa6bd4efcccdd358ffc133bfd45fc76f2. 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/TCAIX2467597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ea89c11789d818f55c8cf1f55afd4f5c9f5f3b005b06486b8e8d5f1a1c1a98. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/TCAIX2467736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d8e313580df67e21707242fbd3234ea62eb62cd051dc6a417f093a1bb12f30. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/TCAJE2504765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab1cd7028d9dfc6757ec49a82b1f194577f033a3d622cbd3913194a6b4301f1. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/TCAJE2504783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc7d0d62d014a27db4982a69b66fe27bc59141477eee08c7f5bb20b01d0da51. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJE2504804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c18cf54815598499f9bb1e11ae53b5b318aed2459dfc9ddc92b5de26c9482cd. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/TCAJE2504827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995d30ca4a32f71a652b6905185ec3e4f041b221e9aaed37af5d48fda63de5fb. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCAJE2504829.