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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafbefcc19431496cf6adf826af2486a5107271b90b263660e0465d4fd0c4701. 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/d8b490d1-62d0-47f5-ab17-8540f0581a65.json and https://artists.proofprofile.net/proofs/artist/d8b490d1-62d0-47f5-ab17-8540f0581a65.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc92a8f00e7df1e494335270e6db3c2ebc2e78054cd2a00f8385033a2bd43bb7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/UST8K1538052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a389505002d62713725e335dd85ee7811edd41e979e6dfbe1b1fe0577a7d30. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:04:48Z), 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/QM2PV1552875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57a556e032e67cd0731f7a5536448a45c3490ebf93f03442e474185c7484723. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-22T00:00:59Z), 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/QM2PV1552876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b4bab43d9a2deea0031fa09a1b47cb22bbd0dfbc8e959a09bbe85707d650ff. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM2PV1552877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65dd0ec6dc75dc88fbf0bcc019011efb53e295f7ac1334a509b0d3449970eba. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:32:52Z), 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/QM2PV1552878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb794b43f31f1dc7f1c8b9473c0157ed7cdad5c894e3271f7b0bbb116aa5cbea4. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:54:52Z), 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/QM2PV1552879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d19909d0d26d4e9a6d0ccb03600592bfcba2e3a61f4a0c7b6efed265c830130. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QM2PV1552880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66699188b4e5d274fa496198b60c4f03372a9992aa95215550e797d27c83c93b. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:37:32Z), 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/QM2PV1552881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4385b3a3d20db0835aa1e190174070c205e1ea019182f9e4d8dac331f19005. 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/QM2PV1552882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f11aeaa1d7a654306660897d1b113f7c588047b9aeaffd0c48b11e920d93055. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/QM2PV1552883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06a5d41e4eef0dea538e493ee0772ed2a7f90d4439f287a535faa5ec55acb3e. 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/QM2PV1552884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3801603e4bb02aaf20906f72318cc6acdad085a0f0ce834eadb30fffdefcf7. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:59:50Z), 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/QM2PV1552885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf9462cc8bda2d2383ded6ffcc5e0bde5ef28d213a1ea84b1145ead7c007621. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM2PV1552886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe765518b107dcf7709cd3a4e0b64e65bcb8ae299eae9379681ca1e11add2fd17. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QM2PV1552887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd44aa8960730a8b1f32cf5ea2b2d3abda2e95dc12c042f55982dadf34fc3393. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:03:58Z), 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/QM2PV1552888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68472186733d0af316efaf94fd879b9a44d66fa0aae31fa3dcf96c3c8a54477. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTBD2367218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf106702e27ec37d5203506adcdee1ee67704d3afd6134bd5b5a22c982235e1f4. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/QZWFM2454627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b7a1e9d52bb7343351f160cd046b67ec9a35bc33a041c4f4d72e1ce2c0998f. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZK6Q2569461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fc55fd91f4fb770c859eadf64ee48c7bd622861425eb9ad8442182f6b04fa5. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZK6K2579706.