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 0xe00b126daea4182805fb1d90486aba810b9f30dd019ebffd2d0ba90f1cda7c2d. 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/b6053301-9267-4ac2-983f-225c6593da80.json and https://artists.proofprofile.net/proofs/artist/b6053301-9267-4ac2-983f-225c6593da80.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 0xe78327322825ecb3813aff274047411ed62506c9204223c2f094a0fd80523b30. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BK4DA2408635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e8bf4774283b7c5057111cfdfcebbb3d82531355957de076837aabeaad88a7. 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/BK4DA2412818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d7daee5dbb2c2fed6e130c11b0da68f24a67cec8bf3d282139f972b9ec18dc. 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/BK4DA2415175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6072940c8fbbb6ae1c63cd5438887f30fda5a1fc2773510fc8025a1f76aed84f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BK4DA2412723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec66db949a9ea4530cb6940dd58b1d9f0e73793acc5a7180af21050dbf7510e. 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/BK4DA2412816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50322706b0014514c0d7fef16df3ad5d93e275c9c2cbeff5347171cab112ffd0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BK4DA2412724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd892b546f1cd8c40b3ce0b3c6cfb3c2a10450813ceb0911b9335f12e74329423. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BK4DA2412725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071218a0f2e7b82de834923e921de9c55f9cfede8df087ec0e0d8c83b4859a3d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BK4DA2412726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a175d8f1940e1059af9e7c9407b3a6e4bb379422ef7d4ee5921e2b0ee8d3969. 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/BK4DA2412727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c84752c5d39a6e0098c5ce5b6bdb9571a4b5bc5f534d8dc1854dac04f0f250e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BK4DA2412728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3638b38a2069ebd2345bf53383946df58950e313c67cce46c7a4c75d384d1f. 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/BK4DA2412729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f809cde56c0a69bca79a17013558266ceaf27da7831c5f042cac0016155bf76. 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/BK4DA2412731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fd47f165c1ee9ca6aedafc8174367e078b8075796e15518b84699d5d2c0508. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BK4DA2407541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd8bcdb7c3370e4fcd0c5086dae0f83edbbacf20ffdb585a54fe4b73cd283ee. 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/BK4DA2407540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf740add29f25685809011c00ad030b87236a34d84f0d19158d1c64b79f524751. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BK4DA2407539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8668a4d886722e0c1ee4fc5ffeaddf9da37b6eae104812d3623ea9381ebb61. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BK4DA2407534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146a3446c28f74543d42e0c3f434e22584ea2b809738264746e0367d7c1f07bd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BK4DA2407535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27eff5434b23856409208d1c07d6451cc01dfd9a3d1187c1c17428414275934e. 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/BK4DA2407536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911f7b8a69bf8b0622f0ff20c12b291dc451fd7d803d221b0f6c113cb8a59217. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BK4DA2407537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9620431134ce968fcbb3ca9d9d554323a84de4f1b83136528addce8aaa6dc5d. 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/BK4DA2407538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa58c14b4986656feb64f2352575caba01f7a4a780273818f9c2fea6cb1e2ae0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BK4DA2417234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f42660f812953a3edd066be04d46383176d68abd43a853777fa6f4e79e9f31. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/SE5752493806.