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 0x360df3830572f214ac227add87585ac9ff28e3d7122a1b01c5ab3b7c1a9fdb5e. 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/c82b49f3-8de0-4d72-901b-81ecc23cc200.json and https://artists.proofprofile.net/proofs/artist/c82b49f3-8de0-4d72-901b-81ecc23cc200.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 0x2d8cabc65dab38ca9e912c96e09fcf6442b49469c50851cd76e52c00fed00b93. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:02:47Z), 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/QZ9JZ1746013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac275ea66b722c6df2aa2160d56bac9d4c6417bb279b35c9f915e8e1d7f8d75d. 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/QZ9Y21756405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ff2ba5795c6f80b46376ba7893427f746ba2d4f392366a0fcf6da7035de9a6. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QMEZE1831570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ff2ba5795c6f80b46376ba7893427f746ba2d4f392366a0fcf6da7035de9a6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMEZE1831570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa9ea4cf2e4eb94f56b509d689024f2e01ffbcd50f38fdae4eadd8229c31c51. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:50:57Z), 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/QM24S2202628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0547c26cd59c9e4cc3f3c19ca2a73204a84b8d3476c469be2695ffeeabd50f0. 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/QM24S2300391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0547c26cd59c9e4cc3f3c19ca2a73204a84b8d3476c469be2695ffeeabd50f0. 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/QM24S2300391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa349c3fd5a8fd72b439d2f029bf72e207cca684765bc62b7749a51868ece242. 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/CA5KR2183638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99035bff912a29a3abe8619703c6536bab689b8174e2fed7e1bcb6e2d87bf58. 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/CA5KR2307946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa349c3fd5a8fd72b439d2f029bf72e207cca684765bc62b7749a51868ece242. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CA5KR2183638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa349c3fd5a8fd72b439d2f029bf72e207cca684765bc62b7749a51868ece242. 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/CA5KR2183638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0547c26cd59c9e4cc3f3c19ca2a73204a84b8d3476c469be2695ffeeabd50f0. 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/QM24S2300391.