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 0xc87e3bdf1d04d2e0d0274715e5028c3ba3666b26328d67e0b513353b725eb7fd. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f57e8b06-fcdd-4932-b05d-75408558d510.json and https://artists.proofprofile.net/proofs/artist/f57e8b06-fcdd-4932-b05d-75408558d510.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 0x35fa946383b2c9fcfa94da4ff05f97ec53cd0fdd554752221471001e5ac92250. 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/DERX41300396.
What's Going On - Toddi Reed & Terri Green Original Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65ccdbebd5e143b08c87919147656f39865c4aa3641ac8b536ca54e4509262b. 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/DERX41300397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418806a15cbacd1907104ed4744c46011fdf297683aff2cea57a943f072a4873. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DERX41300398.
What's Going On - Toddi Reed & Terri Green Short Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13028c81f490a8a1ea312b78fb91ffa3d44c20cb7c2e4844587213a350eb4881. 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/DERX41300399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb11891d131a3f65486f180abb74050eadfa52a3abf5dff4598372d8949805e. 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/DEPR32000658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb08f4abba2d91eaebee6418ca73272aa684d88d8b51788f1f4c1863ffe9d57e. 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/DEPR32000646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b77d6dfd04574de2e955462bb9d5cbf8f3feb8411b65eb3499e84f070c103b. 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/DEPR32000641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc22e76d4a29e0b5dfa399e283879f79781fbc3cdc970a3e647945b183d2fce. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEPR32000088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af260453cd6d80afe75cd75765e514681bcf6421bcc60a5b9bf9a551bb6cfae. 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/DEPR32000285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e7bd304b8baaadeb5b854de6b08432d41b52f51067a9a58aa9014fe4c0fd4b. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/DEPR32000302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c384c3e6ad3dbf62c329a66c7b5d08915fb9c64b98cee721ff568087d6d0a67. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USA371095321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7b75236ee5ec1d9421a50cf35ac5ed4c3ed2e5350bee37e105d180289da3b2. 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/GB8931900003.
Looking For Love - Soul Syndicate Reflex Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7b75236ee5ec1d9421a50cf35ac5ed4c3ed2e5350bee37e105d180289da3b2. 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/GB8931900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67f3f93e504e16d81a886b86b823507b7c9992ab2ce23004d88ca14a15e30fa. 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/GB8931900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860f50bfd9c8f7dfeb00f8596e2c9164abdd2c68de6b72dc866e589f568e3f22. 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/GBNAR2200320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca6c68817ae6733747e0db9664aab59ea6373ee9017160c53f821f1ed918375. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/GBNAR2200309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86cb92e2d15fd4da3634b5418438682e0265b05c1a03dff495915b3c0fb2883. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBNAR2100117.
Pulp (Original Motion Picture Soundtrack)