thumb|right|An engraving of the Hammersmith Ghost appears in Roger Kirby's Wonderful and Scientific Museum, a magazine published in 1804. The "ghost" turned out to be an old local cobbler who used a w
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 0x85d643e2e94043678a1c30a73f7aadb7037cd5ab7097f724b64c77f1bfa26677. 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/7dc4d945-a455-43c2-aa8e-19fe0ee98cb2.json and https://artists.proofprofile.net/proofs/artist/7dc4d945-a455-43c2-aa8e-19fe0ee98cb2.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 0x4e82e5efbe1eefde642c920177b61a5b9fc678c0b68c9a10a8a58dea2e9a6db3. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/CAJ621446003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c739f7c3b5025f0580d5f30021d1686c275f66ca14cb1052da723047a314116. 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/CAJ621446002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0f059176485d2fa724b83e1724763c897ad6435ac657d294c7494354dcce46. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAJ621446005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe929a1212b906227b3452c1240a03267facc0984199d1fd43f0471bfdcdb500c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAJ621446007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9008b6ac772f3ae646cba03a47dd41609979bf3c84a6bf4a57cd52aab89a1a61. 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/CAJ621446009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eab22ab437905fe0063b3131f751c1d5b24d891862ab827550b673a7431bdd1. 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/CAJ621446010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839219c3f95b9d62d7e1e937a6577b78f653e4e1cf7cafced5839ab82a319423. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAJ621446012.
Un baiser d'une si jolie dame - Remix 2014
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac232eb8faf4bb884244d08f71cced5cb5fcdaf6cf43293d225e73794812fb3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAJ621446001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268714026c92edb90a8535439e3f0cc24b1662b28a7c0a6a2e591cc7dc171bcd. 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/CAJ621446017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4d45ea4c96d3ddcf8a9b4ee77531b1e2128cefd5f91f3c57629ee62366ecd7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAJ621446019.
Un baiser d'une si jolie dame - Single (Remix 2014)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac232eb8faf4bb884244d08f71cced5cb5fcdaf6cf43293d225e73794812fb3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAJ621446001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c739f7c3b5025f0580d5f30021d1686c275f66ca14cb1052da723047a314116. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/CAJ621446002.