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 0x52a7e3ec7ba8af40a7f1a1230da6691d796d32cf518aeeff679540f58c9010d9. 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/96fd4460-a084-4c8a-b4e7-2c67f8007c02.json and https://artists.proofprofile.net/proofs/artist/96fd4460-a084-4c8a-b4e7-2c67f8007c02.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
I Like Fancy Fins (feat. Japanese Breakfast)
Helpsters, Vol. 3 (Apple TV+ Original Series Soundtrack)
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 0xc90f239d196908fbac6039e50c7e857775c84e6e74d015980ac6f6257cfd1c43. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USRH12205612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803f04a967d870bccb7724f9c05ce87d044db2a0e4f585737316c7af5d260e60. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/USRH12205613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0c1933fa35ee3b3e2aa174c762ad36361975c7cbb720ccf4eb8761bff3eb7f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USRH12205614.
Check Out Your Masterpiece (feat. Claud)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66ababa23970388901eec00de21bec31bbab34b7fa48f14f5558c438c312703. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USRH12205615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1fe9b207c0137c85241d5d908758ea7f96a69b81038ceb46ce47476104ece4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USRH12205616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbec5ed2c0d799d1618090e11936c1307744379005ce7c8cd19b5f25bd23312e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USRH12205617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7caeddae8d4295f74a5ab7644302a1e6f68e0d6c3621c9a35ea82e6ada01b0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USRH12205618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb33fd466ad0f448ee82e4be68848ae6edddf8fdb111c3c268bc8d5cf9b89f0c. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USRH12205619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca02f95b3b47b5e567af8659b50c2902ac8deb26dfce0943e28df9dcd2d50cd0. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/USRH12205620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c42407c9118f7b74b3f0962796c8177a70bbfc5961a903858b711bdb5c19af. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USRH12205621.