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 0xb4f0a8440e48e78627e9099a895e0f9bac6841c16ecd2ab3d6c3d046d16168fe. 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/5c816e8d-05f5-49cb-8bde-8c5ce13576f4.json and https://artists.proofprofile.net/proofs/artist/5c816e8d-05f5-49cb-8bde-8c5ce13576f4.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 0x89f5295b14ad6e30c4e40109c67e7a2d6a7dd68a4cbb20cd8bc7b51b518c6c7d. 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/TCAFN2198020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1212c6bec7e14978473276fc78f0f5516e8303e87ba3d61ce46568eaa5c41651. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAFN2198038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150ad91fcb5e2d1c496726c197abf4273a7e5b7dc56bafafe461da69c7680121. 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/TCAFN2198040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4aa28cbdbd69cf0060a3e4d2455026b1dc3d4682d8bd122953abc5a4b9dd246. 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/TCAFN2198042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87034a89791ad5a348db41ff58d7f4352787bbff29e2bbf1f14f3428a696b8c3. 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/TCAFN2198043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff3449f3857a32312d286d6330c68275797fc50aa7db831fbcbcc642c346822. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TCAFN2198018.
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 0xb2b648a1fc4080fa2fe765b26eaccb282df4f1e89bdcaef2c8af6c98bc1fda9b. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/TCAFN2198023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf24989e472314cf8efde1ba330cceed411448b237e59841da6582d669c4e6b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TCAFN2198035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7567a954336c687bc0a8868f92275f390f8d763154443b622c17f9678d70e1a. 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/TCAFN2198045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30941ca296ebbdd3923166f8eb239436a4746ed3849918e3038fc0cfa542e22. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAHS2398494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dfd98cb0b0b2ba916b0011090b1ffb25570a137ef7c33ff226f7cfb9a3e36f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UKXN22573107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3794676e9874e309721c5143d6602984bd55b2f8e6951ae0c2661859737cd681. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/UKXN22573111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648e2db5f75b7563a451fd34df418558c4172e097710fa2cf96683031a5e3139. 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/UKXN22573112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966d55ed68ad9a5455b5de5eeb7c174e83e834347a834de75d7aae6d3901d8b2. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/UKXN22573105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66878f2ea010d9b92d653048a3bb10587419f0d960af3788c36b8abdccee7584. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/UKXN22573106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3e557b92d20c0830f438c1a7ab82af15be76bbc6a865f016cc797b5485391c. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/UKXN22573109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc902ac873e63141fdb9b79a88abe9bc1e66f7e8bb6cfb9882cc4ad23c85ea697. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/UKXN22573110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a89a3d29dc76595d46701bd2595997115eae80a52558e57c5e71a66f1dc076d. 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/NLG272105330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd24fd425bec043fc28287f6197deb0d355908a3e9f40696d8071d4d8bf5ee40. 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/NLG272105332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62f14a39f424d44b33e3cc0db442d6f42731a98ebaac238e7fb7d0640db7519. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLG272105335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9849f9ca0104f42da55c4c71956a1c5bffbfc2a6bc2a8919cdc0d661b41f426a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLG272105338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce3064949a72dff9774767c78b662b583f481184800d36ea1e747cf56bdc0a9. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/NLG272105331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5250aa7cccf1216b28bfd220b5705a9b3c1bd00e67e15a72d4ef1e2b26ac958. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/NLG272105334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c96ba2d5f3aa27fca2fff11b49f57a2d13512d090bac42b525c23ca65f108eb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:29:03Z), 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/TCAFY2164600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069a6218eda2a38fff8c393a756e3ef8ec6b2e4ce65557287bf6389125e76bc5. 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/NLG271904539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166752465efce2e38bcb9453cd5f218a485bf7496159446578436d49a0dfd1b0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHN42290273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12112839fb39ac821e20c299dcf32876dc527785a6fddc9cffac4f976fdd8396. 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/GX53U2467343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66efcfc84fc45fcd46cbacfa27c9407bd818a0f552e20313809481d6be048457. 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/TCAIZ2487226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b9027341e51ecced4001a7a8d42e3d6932365686936335799179aeb374dc41. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAIZ2487358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f62e578a4226568f0e3aeab8062f9b3c22f8a482f653076c152586f923986f. 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/TCAIZ2487363.