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 0x9dad044519e18175804507638775ddf35a880d663d42df3691859484bde65343. 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/7d746d72-7ba1-4301-bec7-1714ca83c398.json and https://artists.proofprofile.net/proofs/artist/7d746d72-7ba1-4301-bec7-1714ca83c398.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 0x42d58190c6092b2579ef99dd1c266a1e55f2bfa22c13aa59e230076757d0b86b. 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/GB5952300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb60cd0178d93fb3884c9dd8f6ea1d12073ba70cd5347ea8d1ca714bd09960f. 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/GB5952300034.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca278d87177de9cac2718c86e11cff4f2114c0929dc90a52ec9f835770e4bd5e. 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/GB5P52200294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d58190c6092b2579ef99dd1c266a1e55f2bfa22c13aa59e230076757d0b86b. 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/GB5952300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5946d3ea3fb1f2c859239c25bea99f8f13c9d7065363bbe623df22be9a085500. 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/FR59R2265779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1b59468891c82edd106d3a36e944830677af9bcfde875f0f3bf2077d9a05e9. 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/FR59R2265781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76eca2fa32eb58ff7438e97d37597a444ddfcfe02642e01263850358d588bc3d. 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/FR59R2265783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5578d72fd7024a87bf89f8d52f784262c1ea1fd1d6750d131a0c8a97537513d6. 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/FR59R2265786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd545105117b9de610ef10942ff950e145b458f249e0ceb83aae6b382e34c287e. 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/GB5P52200459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ef14d0dd6c71ebbd372030b430547887c9c1a78af8d3685d4f02d10c3ec63e. 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/GB5P52200462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e21cdde9cd2e851ccd151ab43a827c9f4c1d59d945dfeb9e65c190e55962a84. 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/QZFZ42000798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3af2f7a35b555669975c1647cd9ccc87560a91f2026863f3683577cc86f52a. 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/QZFZ42000801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c431f3afc6e3962b8a4dc2af93e2fcedf35643e7d25e13b4e92a98c0fd3af2. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:25:05Z), 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/TLVEM2421694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68b3ab48d67ffd38a67065f74cde1faea62ea1b975761d6fc7bc8748244d5ff. 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/GBNEQ2200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50faf4f09fc0cba3e396700b0c1650f18996a46a52854b2dc02b62678ea28c32. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAFK2131224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fbe93d9c7766840c5b32d55db8b07612a05a1212ec2a6f3998492577237fe5. 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/TCAFI2152801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a11b8d4c3c5ef604474613e422eb9428d9b7865373b66b177b1909d758219b. 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/TCAEO1909521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5318c11983307edba39998b55ae15ea5422fafe0b4307324f577ecc241880b. 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/FRX872134603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b24bce3e71e0238c62839395a15a2196f5e7aee27ddc175209d21bff6dc4063. 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/FRX872134605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aeea5e31d3d4882f268759e86164c1e175e68c3d12dc92b0663457c25114440. 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/FRX872134610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7d18e0772555c160cd321fad579427e2960d5b456d3a35883a45d4e1e80de0. 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/FRX872134616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1251af3bc81082b9d5a48988a72e314487739a50c35efbf8559a09bdf36ba481. 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/FRX872129889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf045acfd47998d9e5123f0bec721dabfb288a5cd201003ae2373042e29c05fd2. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:19:44Z), 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/FR96X2164005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1251af3bc81082b9d5a48988a72e314487739a50c35efbf8559a09bdf36ba481. 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/FRX872129889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4145565dc5db7925d010425e2ec0658a36ff70aebf24eece58f9257e8e441b. 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/FRX872333472.