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 0xb23bd8f59003c7d93d3baab0e9af758673ebddc495b4fd13618211ea21dd37a7. 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/4e15410f-02f5-4787-b721-b5fcd02815af.json and https://artists.proofprofile.net/proofs/artist/4e15410f-02f5-4787-b721-b5fcd02815af.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 0x1e1a92e6a7dcf08e06b15d2c6c0efd7def14306bb65efeec00eb79119fd1d7eb. 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/TCAGO2279792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fab3bd861c6c50a18efaee6e157658d7971fa9d5cc5042b1773b877e7454e8f. 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/TCAGO2279820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9177ffe488f77673b57ca2c9b288a648be58d2126c8761c34a11f666f7caad81. 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/TCAGQ2224665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696d10e301dabd4696db93d887db005935ec690c76e16488875eca50f65ed4f3. 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/TCAGQ2224667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fc5f3a38f78f22d1c738937e2757037da53f98419d20e3c9c56271df9cbfcb. 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/TCAGQ2224669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0509dc301d0319a95197688de824b772d69e0b83efd72c6922a96c3633c793db. 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/TCAGQ2225440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcada5fa3fff1738bbad75aa0f76b048ef2e5862551ce1c994246a8364ef757cc. 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/TCAGQ2225441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7510c248cfb7af51ec5f24daa7b23dedff70fac0dec849b43b0f3ca6278e16af. 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/TCAGQ2225445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7358c4065a72f9af55682aefc39023e14db19842068cc1e14be803d26455f3. 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/TCAGQ2225448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2847d21061bcd838635d13d987b51c64914e5492b022a5aeaec22cf0050c73ba. 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/TCAGQ2225449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9227329512d43c39c77a2809d741a572ffdeae96d93541349f45f829767cf385. 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/TCAGQ2225463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde6c0dd71ae3f1a833f7a0257b5e302e94f89e875cf409fd2f74b88abd46679. 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/TCAGQ2225475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1a92e6a7dcf08e06b15d2c6c0efd7def14306bb65efeec00eb79119fd1d7eb. 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/TCAGO2279792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fab3bd861c6c50a18efaee6e157658d7971fa9d5cc5042b1773b877e7454e8f. 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/TCAGO2279820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496e08b6840749c2f95ccbfa84c4d41f58aa7673e8c3cdd24215f64123d2bf97. 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/DELJ82095584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969a16a9b5c0bbea9c82750f47d0aa2d046626a89a39407be3809cbf5a5d95ea. 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/DELJ82095585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c63961ee85c71f2cf2ccfaa80633e2e0016290d8ab83303ee488da89c26594. 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/DELJ82095586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf17d86aa34dc000bb6e5a4ece58427f5323fec68c41a26a987164e38dfc7de. 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/DELJ82095587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb04e0cf487d6ad743d5d85cbcc7e05c38e9fb5868a2f513e02b3ff19a10d5f. 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/DELJ82095588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c13d84f94508bc295a2a9baeabad2cce1fad8d33eb275efd98c5bc328dff23. 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/DELJ82095589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0f038bbd5030f4db7b67d73850a256b19fdde9fd9e8c7a25ae836961014151. 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/DELJ82095590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367ffd21962e26d8f5b894467110d1393d18a4e1c69ec134a88376c8b5e58ef6. 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/DELJ82085377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ad182132a22965727ae865293a9192cbd2a03716c096ce69a0b43046f3ae6b. 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/DELJ82085378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7129365e8e2eda15dbc243e9801393282a165d1eec2dcd8518ca48a5bc5369. 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/DELJ82085379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff22746d44d0e1e6cec49265904f46040529ccfcc7e5ac7f407ce3a170ddbd5. 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/DELJ82085380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02142388797d8f2e2bbcc276e33312d13c773f9890237ae352cc00085ed031b2. 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/DELJ82085381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fe11d01faa70f88ee5d8a8a9fa43f6860cab890d256166c3d69ac718114e80. 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/DELJ82085382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fe5a0c2afbcfc11a47d813d0f6eb6badc5830e5d756080474246b50a42cb73. 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/DELJ82085383.