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 0x93b1e05894a1d8be549e2164da40aab15797fda3bc7512493d00145cc5eb9047. 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/bc559cb7-4296-4831-953d-a55cb9a5707e.json and https://artists.proofprofile.net/proofs/artist/bc559cb7-4296-4831-953d-a55cb9a5707e.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 0xc86a621633e477414da62dd284bc47f6434b55aff713dbae7527ffdd2090ea39. 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/QM24S2103662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd80b12f34fa1eb5e552ce937948a092393b48f7ea0de25a597ed0a8775f7af. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:35:50Z), 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/QZHN92459644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa89388f3df40776948382dad454ff109e4996b3c256b6f8420d4b5cd55bb2d. 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/QZHN92459645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056710dcf9b2827a536c75898fdcd14bf9c07eba9744aafbc4b7b68474c2e62d. 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/QZHN92459646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa775c99c65c63929175735b4754a1c0abc098129aa2097922da97011418228a8. 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/CA5KR2201543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed15e48b03e4d613d36474e057e404bf2cdd59518428a1ad049559bd55147709. 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/QZTGW2100815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0f788686fd0cb91ed80e66cee7c7ff2a8ad2d3c86dda0ae7eb7d77302738dd. 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/CA5KR2201544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f057876a154cb3682dc30a4567fac35ba63a3b25352ffefe37a769386e647e. 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/CA5KR2201545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c404add1c82272d956c4672f77025d952015f705946cd73667f80f545250b1. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CA5KR2201546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551ffc9a5963a57dd74daab4891e2bfb9af3546266a79da600f1327fb8be0fc3. 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/CA5KR2201548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94dd0c1b85e2cae487c8ff69f1b12c59ecababdc0ea5645c2974fb8189ec474. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QM24S2101261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08939fd401c133a339b6d7a8d6be10fb1c8110ee1dae199171a70e8bcbed0636. 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/QM24S2101267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544e38317b4efa2be90444c0ffd9dacf069f5a950c949944755e41144ae9ce79. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/CA5KR2066062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc451fb48cf47c871342c5f3cbaa48d153365ef9aa114db30137a0871e08e3385. 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/CA5KR2066066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379e319b9357cccc9196492dc2d8a0737d1aab828e7bde10edd7ec4d3749560e. 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/CA5KR2066070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff451a98c25b456c92fb22b46476bfbda3ed1f1ce14d493303d3d9fb085e34d5. 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/CA5KR2066073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d662f245d504526f2f545b282476ad732d19c563781d80530fcf5e9eb9439a. 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/QZFYZ2076712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c720a19caff9687c09db4364676ca9183616ea22632bb4004d46ff137ed4fc9. 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/QZFYZ2076713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285f0423e6bdf28b7a9040795c051f755239fdef1a3411d7c91bff3ee2d18fa8. 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/QZFYZ2076719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819400600ee3b749ab94379d1bd395edca1f9e1f3bfe3478fbd07869cc6adc90. 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/QZFYZ2076721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf344222cf0882e47ba4b9742503682ecf5ebb59489b3d0c49e0eee1c64cdbfb2. 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/QZHN32065518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdc1601f1102a8719a207020443c47458eca17e1905fedaf3183e67a0a591c9. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:00:37Z), 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/QZDA62431656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ad6cf676f1de529de25b4f13fd97ed324b0b0952b691211b52835d2347e8f7. 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/CA5KR2395935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b7460e94c7bf712a22b941d084696345be5027b54724f417280842dbaca4fa. 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/CA5KR2329926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4ea1afc9472ba99f82a2b93ef23af6a8241002b94a4846802e606b137a5be0. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:22:19Z), 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/CA5KR2323832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0208b91f51cd7b6350bc7a43947327a4e0b93c1621668625ce53ed7b87bf07. 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/CA5KR2318356.