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 0xbf7359950be88bfd7ac09c9c9bcc9c11928e8ff1a3c3df8aacaf387de564d92f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/407bc7c6-9a94-4646-af8c-ddab63630190.json and https://artists.proofprofile.net/proofs/artist/407bc7c6-9a94-4646-af8c-ddab63630190.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Slipping Through My Fingers (Instrumental version)
The Winner Takes It All (Instrumental version)
The Winner Takes It All - Instrumental Version
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 0x0530f33336af5797e7f7a1ec837a6499a7e8943bba2575b207cc79c4c7876ab6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:43:54Z), 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/NL4NL2003884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f810ac966caa94b4aa466004300477e0dfdfac0093d16dcbc10bc69089b8033. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZNWR2297737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5103a6c5aff8ca4c462a1a4e9b7c6f99aee29310ffc6decec6056fabbbd2c0. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZNWU2243625.
The Last of Us, The Choice & Vanishing Grace (Piano Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8002dcf9798984e91b32494ca309db39d18b4eb3baed1e3d89a3d3219ee55f. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZTAT2324647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29d3434a06860da868b829ac72dcae40c230392bec169e761842ab7add1bf05. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:11:37Z), 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/QZTB52356113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479c16ce9c6b43b768f1b08747a49126badaf5c2402fa8b528349b3f762d1f71. 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/QZK6F2430986.