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 0x07ac720bf1b637e39a2b3c37bcff84a7a61fa83049f4e4e7efd9f4c4950e40e2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/51599bee-558c-459d-a79c-e425d21f608e.json and https://artists.proofprofile.net/proofs/artist/51599bee-558c-459d-a79c-e425d21f608e.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 0x7686eac28b993fa59fe845dc6dd512125ca9b2a0e0273db5d334587c6b1d3abd. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:47:52Z), 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/QZWFF2334963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9ccd24346d730e913bbd505187ed2bfccc6e54efe8d24cc6456e663a7fd593. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFF2334969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc423a38ca351575e4f09b2e5b314cfd40c3b6dc6a5e5225e2d9048f42710a0de. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:54:46Z), 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/FR6P12303150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166b9c05599a2324520960801776d0e4ad279fb46b7d1a7817a01706f05903b3. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:01:15Z), 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/FR6P12303220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf057243da3c59564d0db81d58f666cf61e6d8b90b2d36d12366a5a17a13e27b0. 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/FR6P12305220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2ab1eece523b1107b4e95e4fd3a76607731b731a9492217a82fb1eee4f9129. 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/FR6P12305210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf15ee4e6b5123ef3c07b43ebdabf9b80f23275fbd9d323dcf15421649e3fc61. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/FR6P12500830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e9e8526cddaa6ec5741ed90151cbba5f067c2f1fa0b176287b1a9427643f0b. 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/FR6P12500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e411675c254456a81b07d61f260cf0b7fdda737eda58749e6d29c20a6a298f. 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/FR6P12500780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040582ea10082fa6ede5687c211d1595f25c61903e664da3867a9ede91e7f926. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/FR6P12500790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c838cbdda80209c517cf46d5dcb0644a18d85217ffa3f094a29dc9fba814b1. 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/FR6P12500820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf15ee4e6b5123ef3c07b43ebdabf9b80f23275fbd9d323dcf15421649e3fc61. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FR6P12500830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d657381e2542727cafc06f850a19f88cb185693ba8ce8011f5247dd44c9707. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/FR6P12500850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555aa2606b7e68a764ce33e5cb235780f4981a7660cc46b6be5aa006231742ba. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/FR6P12500860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1b4e21912d6999965139f6061c9dc76ee68e0d62e1e477b4599348836be389. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/FR6P12500500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a5b61c2bc2ca6a9d6ad4412cb590db0f0458e21b4544d4835cc5a8c10dd7e8. 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/FR6P12500880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997d0f27a1d90a6fc7f0ed6024c079a8ac51c492f95a5815e298ee1b21248228. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/FR6P12202100.