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 0xa23487595d7b91b3c33c5a186f385c7362b55cca4e46846a5375f94cb1042008. 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/eac01d31-9a8e-4e56-84c6-d8dca3d2c780.json and https://artists.proofprofile.net/proofs/artist/eac01d31-9a8e-4e56-84c6-d8dca3d2c780.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 0x31c85dac392dceb38fade9cd382d869bfc0a3ad1316a98eaa342932b75aaef10. 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/MXF152300315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2a3d3bde409eba33bea6a63c7350f9e1a06a8b2ad62e86134f7ac3bc022785. 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/QZHZ32016442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ac0329bb8ceb175b5bba3e56370202b537ad9c8403d0db449487988b8c9aa8. 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/ESA011784008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddcf10cca97bfad9695c1f5b48af97746a7946a2739855af1572bce239808e7. 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/USDY41746409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca4f0ccd16c196f70f3474e7b7f541b8837ab4c2ca210a66e4ef3a4bc63dbb6. 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/QZNJZ2206584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c85dac392dceb38fade9cd382d869bfc0a3ad1316a98eaa342932b75aaef10. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/MXF152300315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543faa84e0a95eaf2e741a0b08847eaab21bdec56b7b77b5844ea7189b463021. 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/UKU932300349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866d018c14404104c58f7aa0c83d3abf7f39514263063fc870e9efdbcab11003. 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/UKU932231925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba3b4b7f3c94f4fa5ab44a76174e4892643be0e1cb4e98185a6a9e6822935b6. 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/UKU932231346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917789ae7a0932cc17d18c11f978d6e200cf37f4d68ce62352f80d37fa552f49. 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/QZNJV2009444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdad126797872d204594d3b1535ae95c3577ebff7c4f222385148a8a79d90ce3. 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/UKU932300600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11474d5b69612b4921a27d1773904522f5d47015334edf6818fe49ba1b3e6330. 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/UKACT2371277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389d888162b4ef59e8ba8dd7b4e02a34d9b24b0998f3a0d685bc57a19a74ce18. 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/QZW9L2228827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52cbd49a3dda1d855e073561fa16c21d4ae9f561d3f3f371d2d2907ea78a4ce. 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/UKACT2370576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c54565bd2a1e8886623cff777c2725a03b90849aaaf2eacac097888dbb8094. 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/QZHZ42134693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38fc0f4716d84391cdd127d802b59e111461041647dbdd21b967c96e4da4f29. 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/QZHZ42134698.