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 0x83385fc151bd83b76784c919897c379e97becfa07127cbf5fb757de89a242d9e. 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/ea05c4eb-092d-433c-8271-d9d2c592aa96.json and https://artists.proofprofile.net/proofs/artist/ea05c4eb-092d-433c-8271-d9d2c592aa96.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 0x8dbb1fa349bdfe384945b06c3aa44753c0a7fb1120266a09e3e38dffa2edcc75. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAX2349465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8dbee9bb72e0e17ec48a2946d5f77266f6b42d5d7ea25b4355fbb6e55db116. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZFYZ2430518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7dde300093945622250ff0828fb320d532ef63748efa4ad42b0882b25deab6. 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/QZHNB2496590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f311d7206d756fbf195705ac8c2ca343af8da575388c9ccf29f94e0f432b0d3. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZNWT2409551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2495f09abb74ed91b560a59a806b3fae680d6f9101818f2d42a9185e8965a2. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZRP52450258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ff25288bc1cd026626e29596f6234f1261e80e26c23816042e1fb31b7258a9. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZTBC2493910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9105021bd7049b03b1b3e5647f75fbebd07000cf39c3f4bb641ca2a13eda69f. 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/QZWFL2407177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62ffdfd77c151c700b08a196f87af44d6c614d61a10543cdcc0c84caa6aab64. 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/QZWFH2452352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62ffdfd77c151c700b08a196f87af44d6c614d61a10543cdcc0c84caa6aab64. 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/QZWFH2452352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f07d4960113beda8ce585df7496bd839cd22dc384199289e0acbdb13d4effe. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZWFW2407576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38d59939fe0495d5a83ae1c94ab74313c5ad8339f6a3b76bd2a658eb485c96a. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZWFT2407602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0dc89cbb741027e12daccc0205ffd68448aefe986b3927ce24718a2cecfb367. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZZ772496933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289a8062d02413fc886ceac1bb44353eb9c5647c5526967b67bf107e4bafa6bd. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ7R2455343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a923f082ca76e43fd4ab6c82334f7db4c30ce5bf3d06b3ed175286a8814b651. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZZ7U2400978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb32bd7807e3a3f8b534cf385c10378ca853660c852d8edfe86b6c23479f12ee. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QT3EZ2434559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cd00c94fc842cc4f97cb30d291bd698ea1a61ed231c2d3efc597992810d67f. 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/QZZ7V2473336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd490b54dc2323fbcd59d3bb948b945ceca56399097cc589c40632dff4f2f925. 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/QT3F42407488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd490b54dc2323fbcd59d3bb948b945ceca56399097cc589c40632dff4f2f925. 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/QT3F42407488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c268ee2e4718c4fc5475783ba4213e5c8a89e5febd8c8600363cadd6459530. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QT3EZ2482240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d7cb153d5da1d22d5a5c5dbe33fa273b960a4a74a5a8b246bfc69580b70e96. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFYY2525312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d8c12dc3bdc8cb8dd727ae8666d4ff98ba29d99eea011be7589d0f758713e3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZK6H2522789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ae08fb23bdb3c3b828f981c531779758a45da936d92781d54f5c150f4c4f3a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZ7V2570143.