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 0x819e8f4af235794e340c9f9063e187d1af3d79515e620cb263b57fc7247e0c71. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7329f30f-8a6f-4ed8-b2a9-cf3723910204.json and https://artists.proofprofile.net/proofs/artist/7329f30f-8a6f-4ed8-b2a9-cf3723910204.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 0xdba494e2bd50e8d6bf66377ee15c78894c7cd557db267702d92ac0623d46439b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES71G2020577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a05b4aa2473b6190b01ae4af1d10e3aebb38ad470ddecc581d768999516c1f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM4TW2326182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814833c004e06f163e5f7fd207cc4bb25d1962561a93ba123b782d35b527fc30. 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/QMBZ92397032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1da4941ba576e901cfb895990ec9cdb7b5d3e90e2bcf8cdd2dd682dca73168. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMBZ92397034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346505f424671a54e16a3740b5724296dc81b9541d8a3bd02f2cceb9c2e25da4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMBZ92397041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7a7c8f1ef8a665c041d096c275031a65dd4161364b97d103ce89359719ce88. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QMBZ92397042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc77c1fb9b62483ce824a5bacc7074b473395580874df53e30d50d3298ae69eb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMBZ92397043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4d31983b9d56b4d08f9ed5f263b984b6f1247a2d4b517420e96b6103218285. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMBZ92397044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f69067005af25f6b9042f4c833c3bc4f7ea8727a479930b172c668a5b08676c. 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/QMBZ92397046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd73a835773e1af33653a4e9b944eeeff4e37674998223a96c4631a28556e8c. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QMBZ92397045.
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 0xed7993d95c7e165468f2a2019de616b7d22ef7c6ac79119aa8121807366a7788. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QMBZ92397035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7379aa2c42e3dc318553227de46cc27f78e9566337381461d814efc3f5cf1fc2. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QMBZ92397036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0341c5d50b3c5546e3e0d81f8a2e6b350a5e0041b4ccc0579307258561ed88f8. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QMBZ92397037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23b8cfff240f53573169b7a483fd22840d069e0bb5db32fb61a0cb4e7f0c2cb. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QMBZ92397038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be96132067fb117c58a5e0ce9ee143e7154d03db47b229c35f7964c09c9c131. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QMBZ92397039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf270593412080a982fc07977ea148054c6841dc6594e13a123c104c19702ff83. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QMBZ92397040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3744fd660f43e5fb6595a74164538ace04e6400efcab0ba8b03ab9078b7d5ba7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMFMG2328596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80adc6d9496192ebdc5f82b56ace1fea79de62f16d4552ec1cd0a86794418686. 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/QMFME2417973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a250077f54548be6078f11e8c1db2c7f351ba3f05411bcc46bbe14b8accfb5. 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/QM4TX2587353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6278ab417461b770d5906a589d78a2aa60203d3583269ec381fa12dc6e8608a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QMDA62528491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1270bfc226980441e77886a60f49672a5a7803b38002deb1cdd6ac9dac7181fc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES31E2515827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa415a6578c5b8dc8ab6034b0c9395ec536c9076fe4faa8b114bceeb19f0fcc60. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMFMF2333066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd64fe072f2c3a5e13df75d0fc7ded51159e2c7942c191c171e92a4b95ed27a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES71G1947567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ddb99db6290cf17bd300061b1dcbb8c850eb39ae25fcf2f483256e74d8cf71. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES71G1843381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f03ef4d3b44de3f4cc844dcb8cb62fb7a419595ca43c700605d7bdd0ca7f7f9. 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/QMBZ92336191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0047e3587491f301c611831edf7f89a606ba2e228a49e989b5005de067815511. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G1843358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046ac05040b5cac0950e783a11ea5480ceb724f44e69a31b62257497c514fa36. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM6MZ2222057.