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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 0x65c9fcaadf5d777ead88eacf6a6a3d7e382a964ce796f3c5ddbd92336e547131. Chain 2 (Bitcoin): anchored in block 953911 (2026-06-16T08:03:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18cfa950-9793-471b-b283-9f06926100f9.json and https://artists.proofprofile.net/proofs/artist/18cfa950-9793-471b-b283-9f06926100f9.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 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 0xd2021f4adcfa86cb0ae0b9c4e0bc300840bfb49509bec23d0944c04d2e907be8. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/UK7FL1400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75716747efd4bb67dcf918b0b5ac25bedd1dfab7fd2a7c54479b05e3a16f1715. 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/UK7FL1400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd269dc6913d92951a29ad94b0c47cf614ad2116242de5a9a5019602a93cb2d39. 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/UK7FL1400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5279f5582f532409c19edbdb0d67429d7c9ee1fc6ac5ede4192e1abd2931045. 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/UK7FL1400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98f8db03a6bbd158e4c2b77572385b9f100618a862eadaf809a4fedfa80a3b6. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/UK7FL1400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0dc662800676e291a885782de7d1d43e22847fb413707471c29462684afbb5a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/UK7FL1400070.
Don't Talk to Me I'm Dancin' - Jamie Jones Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fc4f301c7e341349d65c009f9655d7c681d0ce8aba44439ca5372d72f4f912. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/UK7FL1400071.
These Walls Are Made of Water - Pan-Pot Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0ce5cb1d0e30d66cb69555be5746ec9e7cc711c7a1bd6e608014a0c530e20d. 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/UK7FL1400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2525d2ddcae3eb3c7a7de361af0f53a4cd1f31bc19ccd1353dfcbc0ff2bc2f36. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/UK7FL1400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f7d3fd4dca54108b1ba7ce9304994b48cfcd48959804342715bcd652b8771c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/UK7FL1400074.
These Walls Are Made of Water - Paul Ritch Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245872b3d9a9df0e7d067f2fe9866ba1a3fc901bede08cab9afd46fe4f8548e5. 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/UK7FL1400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5d65ee1a7358ffb40d4d9e4d46578cdaed9bb29171df75826d85739988c9b7. 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/UK7FL1400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8e62c0668ef589457ccb5429f52c4e8e7e34bff9971a42ca8d1304c6003d5c. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/UK7FL1400077.
Don't Talk to Me I'm Dancin' - Jerome Sydenham Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1912f73a812e35bb5f9521759e3a25c964663eba9062e7cd8c434ce3059ceb9. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/UK7FL1400078.