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 0xe4cb1372bfda1420d22aedb1ca6d4ad1c6428902c75946d527b1be1b2d3e43e7. 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/3496075b-47a8-42e2-bd82-d3e1fad2a289.json and https://artists.proofprofile.net/proofs/artist/3496075b-47a8-42e2-bd82-d3e1fad2a289.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 0x40b9e249abd38ed0ceed1f56bfe34742aa565e4d5fa3bd7a2216737685b15454. 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/US23A1573822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f0733656546177e633dc177e140b1ffe8d8e53008b82d690422ef53e82556a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US23A1573823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95748ad915ed0f1e1994ec5fcafec37f8b0d216e2fbc112724235b33467a431. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/US23A1556753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9746c5094fdd0deb86fe9b3869bc2152ee06a6d23346d6711cf034600b71869b. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/US23A1556754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1ff2ab1ccd3893f3f717adac4b0f87ee4323cc85eaa215fd04ba6d5b4050bd. 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/US23A1556755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70825600b6fd9c44111d11a2a42c92c7974f2bee1f9c4137b6a45110ca7b746b. 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/US23A1556756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969c8577b7dba2e96479755d3051b065ba72d852e49999cbe9e055f09fad6f6a. 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/US23A1556757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8e673845221031b60b6c3db07d59afc0253e485b52bd6fa2a77ae9098b9929. 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/US23A1556758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf706d1f450cefef5dfc522dd84f26f0ccc15b2ccb09cc80e2f35bd9edd5dec. 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/US23A1556932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb7e0ea17c10b8aa1a4556cc9b3f7fd6038483089b3b962f40991044d2da580. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/US23A1556760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583f5b6a9e43d32dc3bb656305ca0f0ad9e734ab0a33aa2e51a0158cbc4d7716. 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/US23A1556761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3576ab29b2141cda58b4ec320b8ecabb018fc89b19636d91aa02f4fdaf018f4. 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/US23A1556762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c14245a644c0172ba42f92605fd57cf2eaf7a816dc10a076053f21a093e57c3. 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/US23A1556763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d01271bd043b0433f6dd9c85f6fd31e77c39ff882b49dcd46230fc78a88c4a. 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/US23A1556764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ef031f6b05e0e73bdf9b065d8f2bab9dcec31ff46aeaffed38f9a12938a263. 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/US23A1556765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0feba68145f74de733f56bf94513b241110f44951535f5cfc9cbf02a56cc5c52. 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/US23A1556766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefe232e830daa4224dfd1f1e16626e5c762d709e8cbfc68851d1d829b1cff4d. 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/US23A1556767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5088ed9dc1a99fbbedaea2b95fcf6d411b66f186f0629e1eb01e2e3debefb89d. 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/US23A1556933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95748ad915ed0f1e1994ec5fcafec37f8b0d216e2fbc112724235b33467a431. 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/US23A1556753.