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 0xf0009abb57edac63fd4f3b119efe2d9e0c3bd888ee2c2401abea931436e53405. 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/e1a26af2-a9c5-4b97-8709-927803f175ee.json and https://artists.proofprofile.net/proofs/artist/e1a26af2-a9c5-4b97-8709-927803f175ee.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 0x79e027570e6ee7a89a324dc90f7217707b9fb3a39089c182d1b1f27014230392. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DGA052384923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab076da6ec9389996f38f5ca07f3a91144b337acee1cc7e6e1dcae6800cdc31b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/USE830990520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b32c23511b220379aaf6aec95326b350322e6926941c04176bfd684f9dd504. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USE830990525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf35f9d121a1ae130fd0144e0b6a9f102e8bb9bf734cc3a4feeb30d95f23ea4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USE830990533.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd1174d4e681387c58472d2dff995fb8e4017410504868c4f66491326dd93a9. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/ROROT1731201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab87dccb899193d6d26e9fabaf31965b622f7ec451a7c687445f50fc82cbbd4. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZGWW1984230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a2a16e16a5ce8a7036925e6fd94b5aba8623d28392ad42d2970d0d9e2fa0b0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZGWW1984234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221f95a162b6cce0d5c0387965d7c8f065ddada76fb0ea80d137a4050f50ac17. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZGWW1984238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc646ab1ececdaea026d629ef5d4960ce48d44eca15b9d5d12e523ebebff2a498. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZGWW1984240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa1a33d6ea647b3092ffa71770a01a47e3f86dfefc5d04b688a549459f498f1. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/TCADG1772669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c34f5597da0fe8191064a8c522a79d852d8448f842758426d219767a95c04d7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZGWW2003360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aabdbcbe1fd583c5faf47d18319241c0aafd859fab91bab679a4891baf35db1. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZGWW2003362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed042b75d26ca6b10e0e76010c004e48049255917dfd96794082a6000727294b. 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/FRX872284804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc228bbb4e51ffccb1fd91c10e50bf2c45844c33a372a3593019cd400fa6dce58. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR10S2243674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9a985f5a13d808e7838810311717bcf490f73f9c31238fc5572b156d1eb87c. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/FRX452221929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865120ba5a7d5ae983ce1db5a9729924b5773289e6828059143ee9703c3fe1fe. 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/FR59R2328627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147af97997903f618f084a62231067fb3089f780f4e2c243b7224c3a5f0187bc. 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/FR59R2365539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2ce39e13d5bf4db575d9f3e5f2379c75d6cd04dfeaf6fe11689a12f063d646. 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/FR96X2365153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5d3de57a46fa865fd3a37a22b90f0a4d02f3dd323bc1faa616bc8a84e12417. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ROROT2302403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb5fe102f24764ea11106e86a18b0998cf6cf47f96dd563ed2cffd1a1ff9cb0. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DGA062341915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e53fb066621fabd1215fc2fa2eaed6949d62d959dddf6dc6681d84b47007df5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DGA0R2310918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0c7c84760930d540207c318ea4b0e2dc3d40a0093146d7a7d28917a1a410c2. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZPJ32337179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6b48b810b672d5c735e2ddab212d2e69f32559fa297830494a6e0f210f94b8. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/TCAHZ2460113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae6a6c4dede6a06cb73c28f380759424576a985177e307fe7bcb7d201ccd771. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/FRX282433187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb5a5b1352b6fce3e0bf388325ff2e9c2250727a0acddbaa232b11b8cac337c. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/FRX872483334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1289031991b0712e01321f8f0eb2c2720350996b3dfc1f5e7651ae1e7e10f748. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FRX872497658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815f312263706c6137361339b08f076ca1e7bfcd6721a7220e8fa7bc2cc0f174. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DGA0L2444195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49d0c51ef8ac2a158e57c9a1b23d7b258c976f56957111ea6e1d13beb12b6ff. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DGA0R2443992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4fea6d344929deecfbfb595bdb4fc39c4adf3d307adee9252a5a9f8d789627. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DGA0T2453990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbde35fce46a342aff0856d35a286d50f3bab72af9a3f2406469310d52eec5af. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR2X42531519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1efd98ba24da8302fa9462b22e0d29be074f00ff32a2a9e91fa53b6305c8ce. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/FR96X2562309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6cde87b32289fe4f20ec767a103c27e6ffc9cbec54bf95a625dbcee88c4fcba. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/FRX202539962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b988127bc0f6a8532f8f56abcefc2f6ea4ca39ea0602acef1ffe4b1c142c0ee. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FRX202554469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36f1eb13b8d9adf170d0b4b99132b9d423807fcd3f5ca7e41dd27755ed4483e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRX202550727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77330fd835273a0255073cb7c92c4d7ed67dd2043e6ee7c42a5784907a02dd08. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FRX202572449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90024b5a4af472eb2ade66909c0c93f21a7fc795761bb05c52e0d98d553816d2. 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/DGA052537420.