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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7298437186030f41d991eb568ca0a27d4f0910330a264514ce0452f3814ef7f7. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/965cde14-d6d2-4805-8e92-d64cb4859619.json and https://artists.proofprofile.net/proofs/artist/965cde14-d6d2-4805-8e92-d64cb4859619.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2edd9aa37c51e86f3c25ce9977f84d0d82995807deb522b7a8ffacf496835d5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBLPF6793673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bab94abf3375e33ad2ab91dbe14bf92617b1d85fe5fb8590c04204755756df. 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/GBLPF6793674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711a69cf6e24c0d98446910b60177bd5e81b32666f6112b20e0af0bd2d29644b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLPF6793675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd748bb225d8b05aaa965ee562fbdbf2d4306f607c1824af2331c83db75b3394e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBLPF6793678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d95b35942fbb6284d53fabe07f229d0f78455a5bb90fead67cb0d410162dff0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLPF6793679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc62c1e1437a4a1a0895602eb7c34a4a264bfcdecd5eb2f6b29567801d3ce7b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLPF6793681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22448ca1a8d310ea82ea70fc8b0991ac1beb13f44e0d312b638c1ba92a40a896. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBLPF6793676.
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 0xddd09619b985a337fde81967ceab97a8dff62fe49ee187e913dfe7258bcad1bc. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/GBLPF6793677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4335307f7a2e88025aaea199b13ffe9a4fb6bf5fcf61da7254e2030b750c6d6c. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/GBLPF6793682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7488753a326049491b44ba62ce56b15e5a3d41c134187163b938daab9e080d. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/GBLPF6793683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4dc762272fcd04c7154a8577f25fab6c5b179127537f6522c863f8ab3e32d87. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBLPF6793684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddf8f3f8752593451d36962363c1bddd56f6e44af714cb3bb90f054f2daca08. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBLPF6795378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbb9eeab6ea0e38d6608bd5b0c5665d6016247275cb1ffd067dc3617237e402. 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/GBLPF6795386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2632a2f42f8c2279cca17261bf2d3677df977a9aa94adf0f201c9aba4061601c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBLPF6795387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2dd00f4893699450e618ead7da3c7152def9698719a8b6086b075055eac253f. 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/GBLPF6795388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0925e7886c0287af294d36f0189ef78f03fda6b5e6214215d4da9e5b438d81. 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/GBLPF6795389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc79f70de5b24fbdc251fb85c3c216a0023dc7bdfa1c15f383c6a6863c0ef75. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBLPF6795379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78704fe3fc51288282f4ac891caf741d403f4cbad1871ee423d49724b9ed5f1. 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/GBLPF6795380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf034894b0d8c8ad0d70a5c13edb8dd9796d335302a0cb06da89a666bb06e61e2. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/GBLPF6795381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6253ca66c7eb7d8c9142900e85ee6b4361a61ed59d143a3239d630b43981ca26. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/GBLPF6795383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1efc9405578c28a457ff15992fc19f7afa15a0b60c76583fc23f16dbbecbe31. 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/GBLPF6795385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f542e781cf31d07a9dc2470307ae65e204666ba14391ed720dcac4e06b8d1d4. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GBLPF6795390.