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 0xde6ffe14667b9ce2b9f0545c5f5e6adc62cc06d38b12fe9d343eaab440e351a4. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2116a1b9-ae0f-41e7-9a47-32c918328bf2.json and https://artists.proofprofile.net/proofs/artist/2116a1b9-ae0f-41e7-9a47-32c918328bf2.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 0xff3edf0bbe98043c333b0f17a59501ea1274cc07654eb0def70eaf4c02cfde20. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/DEK721800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47531971e8578c024d6c1db90a7762786873cb18fcd84801aae42c31a8c609a4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEK721800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1345ef0419165f8bb4b452fc59aa42dc3bbec57a6f039d870406a70d75933d. 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/DEK721800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9662557a8826b6c248b3120eaf60535365710ecc66b4f99cbb9f7634dd9b6377. 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/DEK721800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56f3c3c90544a7706d240d1ff3e0e0a7ddd46c692e9287136e9e2b2e907773c. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEK721800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efe573aa1e300f4fef592f3015d0af637deb242320099d139b13a268457715f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEK721800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8032d9e189b54ad0bed14742bf1f34eae99d714e8ac81af55de2d9549955fd45. 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/DEK721800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0e2ab2a0a01eefa72ce7adb4213bb36921859c237ac5ebda768d3ca98496ab. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DEK721800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b7f07235abb1b697ee65c93ab506681a35823253792e430e888fc464ab155d. 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/DEK721800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0045cde3acd5488199a02ef9713927c6ebda664a91c0b9a0c21dc34c7423f6. 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/DEK721800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1f3ccec59d66db4da53292856a6fd57242257981f9c121df9f1183c8bae26d. 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/DEK721800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d7bc233599524a6639472868a9a4417a879a5127eae13ce4a90afa58bae59b. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DEK721800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d298c7557a263d2dee78f540748b221d632c8db44d078bb19d8c2124f65b45. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/DEK721800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29b1fff037fb78c4ea6735c63835e992d0dd0fcf0990a4edd5794df68dad14d. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DEK721800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12719550b627a40e31c5dfb66684e9f730ddfeeb564d85cfc560e59b7fa35046. 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/DEK722327408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db8ff5e5e66c9fd07e4785d8870dba9d6f288ce5277fe1065ca0628bd2e66d7. 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/DEK722327409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44264355b55b542763008428add2a8ac4b6f042805e48083a3551c3e4c92a37a. 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/DEK722327410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6226e952361686b89146aa57782942eedce43afcc25095b0bacfab5faa241b95. 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/DEK722327411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538ef1409efdb4ecd629f92e43102a19c3a086f2d701b2e79f005151ed89d3d4. 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/DEK722327422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543962420e8f43b4543f32075f4d0edc72ec54ae822193eed7a785691c8caf14. 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/DEK722327423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040c4d9aa7fcc2707072d8273ad01d03fa65cbbdf2bb735b2f6c12819b88c453. 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/DEK722327424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a251b7781086807d08cdced5b110d92d7bba7466a8f0cb352bec01de34156f6. 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/DEK722327425.