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 0x1f0270f1e76ba3d1579dbdf935b1973c37ff5ff25575e38f464f6a21ff92d0c4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9132ccb8-59be-488a-8a4e-bcccae90a918.json and https://artists.proofprofile.net/proofs/artist/9132ccb8-59be-488a-8a4e-bcccae90a918.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Summer We Crossed Europe in the Rain
The Summer We Crossed Europe In The Rain (The Kazuo Ishiguro / Jim Tomlinson Songbook)
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 0xfadbbec6c252e279247717ca4cc0af08185b25893641b3b3ccbb3117dfef365e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKRR1300502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3635e1713c6f52c6f71930e4f9922b820a66bf6d8a25d4ab2d7f839a86a2156. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBKRR1300505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadbbec6c252e279247717ca4cc0af08185b25893641b3b3ccbb3117dfef365e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKRR1300502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb326fb3c56695842588cbee7177b74d28d54c0c37673920746aab917d1772270. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKRR1300503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60de6c679030b52d0febf7612334a048e7d2ae91d7a4eb23338588b7e919cc9f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKRR1300504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3635e1713c6f52c6f71930e4f9922b820a66bf6d8a25d4ab2d7f839a86a2156. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKRR1300505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f8ddff45c5332a475e1f07bad0c14b2cb0bb2729b43b0ef2eae0c51146a6a7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKRR1300510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4116518a7a9e273453514a6b5f3d330d661920ae50098af6c0fd249218ff9177. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKRR1300513.
Le premier bonheur du jour - Bonus Track
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9db1f7505b3f80fdde328b374c978bc02007ced3d7613b8709e7752ee0b441. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKRR1300514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5bf6c14a17d8ac29f2a9222af2a0d8eb6619464060947c12dfeb9d1047e4df. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKRR1300515.