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 0x19f7e2df83f74bbbfbf4f97806733457924a2a4379f9fa98aff1077a01e516e3. 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/3b5d54bd-aa98-4089-ab89-072610a0fd8f.json and https://artists.proofprofile.net/proofs/artist/3b5d54bd-aa98-4089-ab89-072610a0fd8f.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 0x5d20d393a0437f487a38132adbd23f12aaede12292fa0db2c563b87de8735c47. 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/QM3DF2263869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f96605607296e9b34ce57be34f3a29c672f0c46cf6df368345f9592b36d40e. 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/US3DF2273378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb134e2598703dba8478c1c648f0656c6c89ab29f32ee7f6cb833e5cc71dcd5. 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/GX5MY2342006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44110ba2fd96031bd5a577ce61ce034d7fdd39611cf8c77093f7a444d516220f. 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/GX5MY2304769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc44a9405900883437b6575c88306d28a11aa15e71b0f979799b77be81086ba. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX5MY2364929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be9db718728ad8abf95676443725ae0a021c63e9b50dcac11bb727389cb59b4. 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/GX5MY2355942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b6814116fabcdc41ffdce336b05f0609a2df66dd519d72b5364f713ed42703. 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/QMANG2212295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752aa9686dddbcd8aec66db16ac8ae7b6cf5f2a5fa7cf2f08426c872aee6257a. 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/DEQ022390660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a00540a170958d102234094418f9f8fdf4d42a7fef91ec465db2094a0a91ac3. 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/USANG2245966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f639978ea353078030590b21d19aeb73215de9f7ba98eb702e1e6cc5bf1fb2. 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/USANG2219746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd246f0a8bb1d87c3e4db12139c0911140ae6bf9a9d331325a61477863c1e6453. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USANG2203537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908f8ee78c2722a330db04049af213d2f00a2fe6c4f90bdbfc8320a40a52afa5. 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/USANG2200182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aae82cc4b5308ed6114229258ad2eb908d94328e2cd58b124c3d3406a8c761f. 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/QZNWS2279071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8816b62a7940807016b5c195d71a196ebed36dc22163e268bd84df3201545fa9. 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/USANG2243790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c626a3eeefdec8e5da79c65740d7671007f605a867e671fb73f54b53c7731c. 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/USANG2243794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f639978ea353078030590b21d19aeb73215de9f7ba98eb702e1e6cc5bf1fb2. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USANG2219746.