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 0x47ceff5ec0bf2ba19710434e8787ead23d60881d1564bc1a861b11dfec59e84e. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/92586c19-788b-4a0f-ab06-bd72ed1737b0.json and https://artists.proofprofile.net/proofs/artist/92586c19-788b-4a0f-ab06-bd72ed1737b0.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 0x29b2ca110e8a97448687ea4dd2201528b36026b7eb6408ec10305bc319687c3f. 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/USDHM1716065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd267eb4209526defbc6e369159b1b9dd77872ad91f52e6b0f019a900d90572b3. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USDHM1716066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e41298adac38914eac26d2638077480b9c1a3ac3e567bb263d601d3054df9b3. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USDHM1716067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8714d33dc9cb833891d40f9892eec69d3782940fead731dfd1804fd6ed15dd. 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/USDHM1716076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33fda574bc532d4b32cb141c5e2479562a724d1a3670b576e8f91eeb9f55ba6. 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/USMA20215209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6c02d9f10ebfa2e212a30dbf129f4440b6401bb66bf0c48d3535dbef58ee27. 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/USMA20215293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698b8e81fbea3f58f820a25245469e5c22c2f3cd1fab338752dd0b8b04edb5a1. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USMA20215323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838cfc9ce082564075dd73f793779df007efc65de0656cd4b67e8da4954bbf9a. 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/USMA20215287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7a0a46f078ced4be72dd79770bac773d3117d0230a28d4840dfbcd431d831b. 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/USMA20215233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35aa111e117184afba85050b7db845a4b8ae6919dae2636dad576c742e97df51. 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/USMA20215328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bf5ae6a6dc0a0c876826943ffcc333dc67018163a130300a148457acd6db51. 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/USMA20215254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa7f639ce4e740087d60e4b03e169a05fbc66640c0f7f885fd5156cc51fdc5e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USMA20215218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c4f2a937f23ebc295918d4899af53de57ebee0843ed845490355866f7ea5c8. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USMA20215335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de765a3381e5832ee27b8645d22cf2e4add6c6ba60dfaf10cad73cddaecfcce. 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/USMA20215203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaede4f707d32fd1fc962f9028c9965f2d1bce568e5b85da48abb92d1ca96c893. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USY9M0910089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ddf9f07f754f435cb8ed179232e19f951ca1f6532ddaa69c561839c1a3be7af. 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/USY9M0910091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a379156526aa1f5bb906f728cc0219455f61ad12341b00ea7a6fbba83b5a0df. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USY9M0910093.