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 0xab1abf095a0442ae1f99b4137a8c24648aa9f0ca4cbb9ba73aa75cd2301eea7c. 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/837577f6-9a65-4da4-a6ba-005aac156cd4.json and https://artists.proofprofile.net/proofs/artist/837577f6-9a65-4da4-a6ba-005aac156cd4.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 0x7936874304c60239ebaeddc2bfe3682c8c66b2b8e840357da7d85acbafeec0f1. 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/BXIV82344758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819a0d6ebea1dadd54bd5a68b90deec9849b6f0c2a56f236869f1e4bf4ef321a. 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/BXIV82213705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad01fa1081690ca1c3182995750022a87e392dd4222c446fa38d1cc21cacd2e. 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/BXIV82346368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1511037b6877e43e45b73c0efdb5ab58a1fb040eda464550be0f998b3e9e09b9. 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/BXIV82451368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbe0efbfc13e61c70a56a5224b619cadb10973294a5f91632916faa57811b2e. 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/BXIV82360427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfdead5d1ecd6f479e9892f48e2719a2a6ea952390fee5aacc95032e1ee8e6e. 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/BXIV82226432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f55b9f26c140ecb3760e753a63ade6cb9f59f2dda7d75400862a755d08a780. 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/BXIV82418248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1a487e9cb3fdbc1892936f637606d6f9298c2529b1469bffb354c80d8261fd. 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/BXIV82317263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d74e827d70086231cab9223f16a5fc335ff4016f69df44df487be3ebf06f09. 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/BXIV82417486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5eb90ada2286ddb6b797e02fb9b56f3a1534331935aa4956e969d738be884e. 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/BXIV82457213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ab76bc7d5a81a826d3387ad4e5bda45a127a5baf40414e2363e968307c1b46. 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/BXIV82462782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f48a6005ebe248632228e406ee7b770593ab72d50531588c8de978e25709f21. 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/BXIV82416266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf666de779be4ab669cc6b0d7b92a4cb0531ecb887a304e27c4c474c9537fd5d8. 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/BXIV82427666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fa63819fdd41e3f885c102396a7cce4696b360da7dc69fbd905ce49cadf331. 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/BXIV82426263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cee7530dbed0bb5178fd8ff9058eef54cbad18b5c9562c704bc02916edaa9c3. 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/BXIV82437043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1877c8fcdbecd37dbb1a296664e9255a9869578f1b9c4669f4c2c0b78e3c42. 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/BXIV82442745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e2f51a37a324f429b26516ab3b6d15e421ad76c82ed5b6968f97073717e124. 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/BC6M22512138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4a3278e7a85d9dcdf9efe253284cb12c1d304042ad626e5fe524f7776fb2f1. 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/BC6M22506636.