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 0x54108238a20ff1138be409c9106880554a59f999173530f1b4ad45a06e285f48. 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/b97df1a6-0688-4c32-9379-87a0f31e2dbe.json and https://artists.proofprofile.net/proofs/artist/b97df1a6-0688-4c32-9379-87a0f31e2dbe.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 0x447b6a344e8b38de6c391f306dbb785e0112728345398bbda4d7dad8664c83d3. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZHZ52158186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0eeeb6333127e44a5a218a35de3d202bffcb53fc51cf00703d38751537689c. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZHZ52158187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e1ba487530fe63ae922841579522bf73326fca74da211188939506ccf986ea. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZHZ52158188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183262dc359bed6ad60839c9771442bb15815d21a3aa96fbc070f3404f4255a0. 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/QZHZ52158190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd897c98cd25f8e490c807018dfb4615d783bf5fa8a8f795ac145ed7278a82746. 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/QZHZ52158191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df5347af81c08c67d7bf4b2d2eeb6d174e2aab61ffda31f0a461961d023b2bc. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:09:25Z), 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/QZHZ52158193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f33451dd467b8c9bba4752f3040e038348d3b97a26aa6240612a7281a16cc5d. 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/QZTVM2107696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa351ecd2d8138f94f1586c4bca35a41d967cbe47baf8d649519d4f14a01bfb4f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZGLM2340628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2e900825c33bf485a16dbcf91659ea1180e51d45b0025e83a4d605bbc4d41f. 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/QZGLS2333705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c181c0d7cc70240dd8fb77a8a6761ef1bae38129fe0bb37cdf12e8bb1c57618. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZNJV2375093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13677f0b9f356914f3df68b684489d6e45f5716ffeefe97e9482b27c26368a5a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZNJV2375097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa1563ea92cbc8a5944355677451c7da2fb07b6b382839f9719c357426c5fcb. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNJV2375098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7116910440f473663651a988f4357489a80a81008f2eade6c88bd8a5424e0640. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:54:00Z), 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/QZES62409443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3409903540a3a9e902078027c404cb83fa38404b2dc489e0eb41e5cba6c821. 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/QZWFQ2427408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06d80d49312c41160c4ad742adb6f443b6a2a970452e18d7de7f406b35b26ba. 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/ZA56E2305578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50050a7fa271483f392148168c26610b99e31257ededbef5558de9d0d8029d76. 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/QZNJY2152031.