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 0xaff85731eb0b50b6e9d796a1d1fb7ac012cd94e987f915567a47738bbedfacd8. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8618de84-d39a-4fde-8b7d-5af126c441f1.json and https://artists.proofprofile.net/proofs/artist/8618de84-d39a-4fde-8b7d-5af126c441f1.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 0x7e8659cc79f896d2a2a61e1d3a3dc68cca973cd7013298f93dc5d6c81b15cf26. 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/FIGRS0500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cd76389f1e56214690e06534e993a2a3cea74eb51fe16c13d7edc9888c6116. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/FIGRS0500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02de32fa645af6caeb1d3b9306abdcdce1332de188ccfdcdb4c263782f773cf1. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/FIGRS0500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec02afa3dd5c11805090f3b95f52454aaa42b5747a8e7693e61c0d54b2d8e2e6. 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/FIGRS0500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449020c5925f8a485ceb6fa41bbb57f15257287325e79c4b061a79157b7fef97. 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/FIGRS0500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6145321968784b5a2ebed86661e7b5e656f4d349318593be8723e7d78c7fc2ec. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FIGRS0500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e450ef8b33eba72570d518e8dba259cdca157faf6fecefba181b0dc54a9ca3. 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/FIGRS0500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8053c41652b4bea1031e9e7d47f60bcbcca8a933d6997b9dfd68529882991dd6. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/FIGRS0500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5544a17e8e31213fddad136d92c47b8bebee18518999344b96fa4ebf8845ccf. 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/FIGRS0200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151ee1dc49b6caa2c4fc4d79b9529a10ba0caedfbf2d5d51f9af3792420f63c0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FIGRS0200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4038c94f32088534b8eea8d30da08d37c8d34224dd9c640bf2eccf29cebae35b. 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/FIGRS0200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce3328310984f509a918df6191beac65155f7815362608870b8c6675384ed39. 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/FIGRS0200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09105e9b8bda17e5ad6bae77711561d39db0956a180271546dcc6658871ff6e. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FIGRS0200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96da4a9e78ca231d2b7bf13b70dbab9efc0866cb9474405cc7a0d1da468cf24. 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/FIGRS0200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4aa354da37f205297c1a03622d0911ef46f6a50ff5a173c9171f79a1e8e6f30. 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/FIGRS0200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c01fefc78928dfb4abe862e6ab3142b13209a9af2481f44644392f160f7b139. 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/FIGRS0200076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae8cf572c5c64c6345091d90ceb6052e5a298cdeafe2ec272c8cca203ca0900. 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/FIGRS0200067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3a22edd971a692e160fd64929d40fc05466d5cba7765b64c0d41e8112de58c. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/FIGRS0200072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e7b0985a24b577903291c6ab5a3db0add98e2d53dfbff2434626ec9611c441. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FIGRS0200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d7ad882c1d55acd143bcf739c963c6669c3c7312c3ac132799283b4b7f713d. 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/FIGRS0200077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f2ebc6b71caf04cfa73cb7c1ae1aacd1d8c7899c1ae4bad6cd0d6c22264be2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FIGRS0300099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c7fe84c02448f8b97d2a7d29a20383b193ae33a47d2dcb10234ae6f6efefc8. 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/FIGRS0200059.