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 0x20d054a506692b5e4d9638753e0229e55f90438852bbe68ee76dd692e2593ff2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1245194-f28b-4bc7-95c4-78eff1d62efa.json and https://artists.proofprofile.net/proofs/artist/a1245194-f28b-4bc7-95c4-78eff1d62efa.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 0x46c6b9e8df2201e0aecb71fccf9e62e6e735e37c2e62bf8ae7854765192e0a92. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TCADM1886875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac7742a9174c23323fd744018f218d63c4b0812b64080694c153e290dd06edd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFYX2001929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba6ee2a1867d6b6af8b3036b9426544dd967ee945880db941537d343d143cc3. 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/QZK6G2057336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd3e26d03a383ed5bca2883cff63ec933e32a508db3daa7b00f25101f708a58. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZK6G2057342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721d61922bd3a47fef053bf6b7c8be97980e5c35febf295415fa0b1dd74bac5c. 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/QZK6G2057348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ce03350f08435b566aad35487260a602a7ee4f0ea491bb94116bb41eae05a3. 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/QZK6G2057350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bdb29f1284f43ff80a4e816dd393de12d964ae6e8ba8e10fcf2efdbc99f366a. 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/QZNWY2395922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463e981fc1dd33688bba8b64798002ae184916456b5d9b3f4e9df5ad2da291a1. 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/QZFZ42478423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3874c353c4059e23cd48dc524232360a275d633c1d4d4883142c0c4f8b8c7cd3. 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/QZEQU2400529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e47a5cc49d9acbbc3a622b6eae5bafe53e0323c4e7a917532e378b62db90e45. 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/QZEQU2400742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3874c353c4059e23cd48dc524232360a275d633c1d4d4883142c0c4f8b8c7cd3. 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/QZEQU2400529.
Girl from the North Country - Piano Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f60a82d52b4014892ed7a1c4d710bb3f38e32e2c847319f33d38bd6a42da13f. 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/QZEQU2400874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153ea01d8e322655663d1fdb2144618e20c0b066441cbc57d04c6935cb22bf95. 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/QZEQU2400875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e47a5cc49d9acbbc3a622b6eae5bafe53e0323c4e7a917532e378b62db90e45. 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/QZEQU2400742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ef8dc2a242dc4e2b5607110c0e48cec454b97015c43e835dabafa3fad68319. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZNWX2592643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cb4d30cd2e5f8b77f96f03182d64169e046d869e3c3cca7adafaa16c6bfd62. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZTAT2336394.