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 0x598a4320773aebcdb92cc77fa330ef0c6bf60ddee9fd5f8bb22f303e32511378. 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/0728e5ee-4068-423c-a62b-8a86f489e411.json and https://artists.proofprofile.net/proofs/artist/0728e5ee-4068-423c-a62b-8a86f489e411.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 0xb6bd9b2fe95bfe61dc747c6c3b5d8da924831cf632bf4424ba60227b968141ea. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA52424796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532dadb005ac7400fb731354b81e5150bc84ca81b91a38df06021cbad2d3691a. 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/QZFZ72465516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e82dedd0791b4271a054e95aea3a95492fc423495e3b3de635c16231ffe4f9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFZ62461489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf391766004f5eae50f64857c551d018a40a4bb4f03c1806829713a63d8129a3. 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/QZWFN2305958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b5a25fe637ff1c2395f33798eddb83ce4fcc8486d7a75f5e2d6ca6b26a3094. 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/QZWFJ2354402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6f5209228bb689f4f94e9c1c4963bad18fa2289f988fb02c6ea3c9d39ab783. 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/QZWFJ2354403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977c884dc753d37fecd1ae3db504eb754f4f6f276fb232cbbff8ba318aec1c37. 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/QZWFJ2354404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc3bb0598d32d828d62f344317a62571388597ef2499f9715a7867823f5a340. 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/QZWFJ2354405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c582346a623346b203adac2ad4b4a307d7a15f16f133eb6d6b0312134a2f65. 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/QZFZ22582895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd93be6fa0b8ef83a5260bcf7418e85ab55439cb563d7e82399064af70514b6. 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/QZFZ22582896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d40e8d9f3882ebd86e85e0c072e2f66357032f46a69cbc5a93bce80dc3f5dc. 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/QZFZ22582897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08ef21c01cea441fab61da36daf1aacf1e3f508395ea34f4a2c376148ab4d13. 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/QZFZ22582898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb835f3854f0c6b2adb52b14d98feba937f5e0aa713dfbb5f1483f9933352d95c. 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/QZZ7N2475829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcdd8ccd5a4bd501aa568d4e4467a88634ea260628f62599285369b4292a305. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZZ7K2400471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd470c669a0e5b923ddbbe1b3d4b757ad5e3c8b4c01f550afb685582dff78eaab. 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/QZWFL2431229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49995c5668870adc0fdc86fa544ff5b8f4bf4f227c25396081a3f546c54067a. 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/QZW9M2336258.