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 0x0cde3151713d7ee37da5b55ecf74f75dc8625541625a0d9d62713d4dd862f5de. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e859a8b1-341b-40a0-8fa8-68bb9dbdcf09.json and https://artists.proofprofile.net/proofs/artist/e859a8b1-341b-40a0-8fa8-68bb9dbdcf09.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 0xeb12c330dfb542fe36c0c5e7dcbb99d40fc1a4a552cf06733934819d5723dc67. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAID2434371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914d4e6a45f02ceb1c2b9d4f9128fbbb775c881147e628ea83ad7cba4c90eccb. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/TCAID2434378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbd4c2ab279a7e33ce06b14950e6b11ee5a93098e2be419e8348f9bb1b53226. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAID2434379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6998da28dd65c54829e77ffd28eb998ee01a43f10692d5fd29ba583a74fa0d4. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAID2434387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3660208ee2d15d3538a19c333fab3716743472543d06864b8f1a23bcb0ffc826. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAID2434390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e17f5874a0715619370864be5169332783a2ee800773c054d7033ea2c28262. 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/TCAID2434394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49fefe53ac8a9b3b15f304776358468b56a10b2467406135aa55e038b255940. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAID2434395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c57c80b869d25437aca27e70b19ad4f046a7f64b84e2f6ad99a2c4f45d9212e. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAID2434399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90d269f2c2510171f263b1e8dfdf1b3d1f7b9abcca21679ae2e6aec030797f0. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/TCAID2461271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549407b0823d3271548efdb9de56256d6d56123fbc410cebb38720cdbb11f57c. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCAID2461274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1848e14828ec91d2bd5db05819f7de24aad9e4392536ad6b309576ff535800fe. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAID2461277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07be98d041403a97b027e673da91951f93b861632f190f623c8ce4fa9faf9f6f. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/TCAID2461280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45b6771492281c7bb16624663f605c44b42b1c1f90015ed8000482d64affb94. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/TCAID2461291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cab4dd867b2433fa06efa44b200a931cc39cba83e8033250cd99eaa4dcd325b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAID2461387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06862275f63d5230db57f7320f8ae90381f37f84022b660bdc3d61c1e3834e5. 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/TCAID2461388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80ad3f8852330dace17850d1873fd819d061d95628e42842c9db487be3e0b13. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCAID2461390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932fa72c2e42a75f86279010e8c6a6ff0332d6863c4a3c9c43886d257733e939. 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/TCAID2461398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c2ea6ec3d50244d251aaa9f86c00cb97c6a796052f451c159b03065c115304. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/TCAID2461402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbcc282d3a06c3db2c171912b47d317314ce73b07a9ac1cb0121d6ec5772096. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/TCAID2461403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693147e5e9a363b10b5c0bbbcd2ac17db8d5fca8e8aab24e05b5390e7df372b7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAIE2481279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76790ff7467ece45253042a745d2db129478c5690aa1953047f0da06242539fc. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/TCAIE2481293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc0fa469500731c68456f4cfabe7321d4bb0e62d35db3a944755a525201255d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAIE2481305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665d5690a44d9d3cd1e8ae2c6b5bc8f60d87750c14be052c6c95eeab2e6636bd. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAIE2481331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ca546cd0574d9435727a72418d32607d7fca77285a78f7976332d27b0d9af1. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/TCAIE2481337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61b82f2e65f0ae119a5df85ec63cbf1d6ec5017bed5546720739abff322d981. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAIE2481346.