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 0x5aa1038919e47f9ad0eb839795da5383c3f5dbcbdaa3894cb2bf1b0cedeaee8f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d13426b2-8d72-4056-8dd2-d57b69470677.json and https://artists.proofprofile.net/proofs/artist/d13426b2-8d72-4056-8dd2-d57b69470677.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 0x4ab55464b9b2072e7f7a021b9d4ffdaf15fe3cf3162e67f0da97a8ed7c72f929. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLT2H1900123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ada20e33ba9407d278d1b4db9e91697f18270b2335d4e58d1490a23d8652610. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NLT2H1900182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bbd13c2c28c41f95cbf24c8dbc751267544b0adbc5d7c9f0233271fd76e94a. 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/NLT2H1900164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5392ea0dd9d56e3be6c12c04086c1227f46cd5c656647a78b36d8e9ddd56944b. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:02:54Z), 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/NLT2H2000038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39d74f2f2ab4d9142acd49b362ee8b77ef8598ffa7c80616b4cb24bc435095d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NLT2H2000098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a28afa5f8740e834b95c70595b26f966e4b2c107e7c76bbf086785c3cbe25f. 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/NLT2H2000096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8087933b98990c73bb700c39d99c199a62db48be606d1ed2de0d7d5b8e657164. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/NLT2H2000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd81fb9b63e89da2009b21d43307f98e7e9df44d3d033cb51626ec580788ef4. 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/NLT2H2000224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138e2e1eea4e2947b2ce85ef3f4396708ea42e95b51b1b09f9d8adc65cff8676. 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/NLT2H2000422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd09f827cbd32d47b57762eceacfdcee29e75cfe5f679586aff25084e7a29fa6. 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/NLT2H2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafff281c9d512d4dbc0db31e6533308a6269aa9672b70b99c658e3d8bca7676f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLT2H2100211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85326735bec7d07a6c85ac2cfbe00ab6fe3623f3a524c02899361a7359c7000. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLT2H2100326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48771bcaba50f1c19623cf5fa2d42a1d8e9e5154062deb51cdb361bbd07ef751. 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/NLT2H2100336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812021a329f860e16a6dd355dfd867b3a31bfbd057f717feea365cc5cfb7efe9. 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/USA2P2143044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd633294b0221478a91d1b37d0bfdb54c3685544a036a8e1d3513f70a6f40e9e2. 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/NLT2H2100241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523c993d37ebc78ab24a6593573ef0ccd0bb851c1be4e971a756d2073c196f9a. 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/USA2P2150477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230b1ec428e8b9397466ae6311370449281a960e2207ad0c876e69e9e16ed976. 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/USA2P2205711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284fe019f418f6304d39ffc2bf13896b2712ae9347ba524bf0bba4464baccc89. 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/USA2P2205710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3fcca18cdcbd71cec57988e24236f091a6e0b954f97c72355cafc57fa389af. 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/QM4TX2052704.