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 0x32dd8039ba24cbad83addd96144989236d0b42875bc182dc0987c8cecf4a5686. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1fd341e4-110e-450e-9f2b-81239f783b82.json and https://artists.proofprofile.net/proofs/artist/1fd341e4-110e-450e-9f2b-81239f783b82.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 0x31ef34da32ab8458c853bedf88fd1baa1e08dd1b9fabdfef0ad14af768b62d57. 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/USA2P2415064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1995ee2ca067a60c6c228a4bff7fef4b5c1f09c0e6af5e047a1334e912fc8c. 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/USA2P2408193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe369f5de655f4f06e2cd0320d53214e19450ba672c29bdfbbc5f8ff06cff1381. 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/USA2P2415065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1995ee2ca067a60c6c228a4bff7fef4b5c1f09c0e6af5e047a1334e912fc8c. 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/USA2P2408193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41a2bb7a748362edbeb7f56650788af81f21676e76821112b3a74236b09a8e8. 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/TCAGD2278377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeef8782e182ec03f432a910fd0538408059d86831972fcbcfe251df23e3d983. 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/USA2P2119341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a8f00323e4d4371b295853b032ac90f8966e44a3f3f2bd2a374e0272f93cca. 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/TCAGD2278709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4cea50891a244cf81ae994e0a2b33fac8a80846ce78e255fa20ea9def1fd56. 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/TCAFT2160336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2752aa987670e1973b6560e0a63e7994e3f1eae258e8410ca6e879ecfadd6743. 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/TCAGB2207434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0045f6a6e78af9fdd9b2cc9dd8ff48fb3cb38b7d0915f95907aa6aeafcded5b. 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/TCAGD2278771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b9076bc77d4ffa7c69a38b0445f52d3a0edba63b51bf59f319d5dbbdef08a7. 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/TCAFZ2131186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe8ef0963f9484685f35bc8e6f79b33500c765702e32539e380133ac45a25dd. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/TCAGD2278397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5090f6bb0d5f323a4cb9508f13cc99926700461b24a8909e7af05ea3990ba947. 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/QZWDE2476731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9b2f4431954b2e05f9cd9b745246b58b7ecca77bb2156290ca2a3507c06ddc. 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/GBRKQ2417533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda9b4ea8cca4e37e571ef693711be3057650d551ef3b03f0f8e8650e60dcf2a. 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/QZWDD2427570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9b2f4431954b2e05f9cd9b745246b58b7ecca77bb2156290ca2a3507c06ddc. 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/GBRKQ2417533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9b2f4431954b2e05f9cd9b745246b58b7ecca77bb2156290ca2a3507c06ddc. 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/GBRKQ2417533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b9076bc77d4ffa7c69a38b0445f52d3a0edba63b51bf59f319d5dbbdef08a7. 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/TCAFZ2131186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4cea50891a244cf81ae994e0a2b33fac8a80846ce78e255fa20ea9def1fd56. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCAFT2160336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeef8782e182ec03f432a910fd0538408059d86831972fcbcfe251df23e3d983. 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/USA2P2119341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8100cae8d6575f58ec50b59b1009470fbe66be1ddc899fb98aba85c8bd1a158c. 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/QZHNB1978567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1c5565ac2afa6a21811c83efb2624e215517ddc6271cf452f840a96e8dffde. 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/TCADT1814908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6fe4f69fff385d898e89b88c3cb1fc30d9da71defc11ca08f92b40d14eabf2. 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/QMEU31614202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90705c79e4ead63efc2133afe9d17d9cacc1f512876e49775eeb75acae3826e. 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/QMEU31614203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922955d452d93b35d3c5bceb34361c927716908b49fc8020984e21f767110d90. 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/QMEU31614204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fdbc5d9f112014eafadbefffe28851e9897e74d9e3a335fe3691aa1907f5a7. 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/TCACQ1676355.