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 0x46d7e8dbb0a3b74b2b316b1528ecd19f36eb6441921d40b5dbce9d24fb6a9a74. 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/1ba71064-c604-46b9-a1cd-4f6c15373103.json and https://artists.proofprofile.net/proofs/artist/1ba71064-c604-46b9-a1cd-4f6c15373103.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 0x33498f2c6d5a45129b93a48c51ab86a0e0a44df062370be2ca5d5343d512ae8c. 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/QMFME1983503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7e3e90556597de06d33676afd809878406cf136bf66ecfcf044cb2278ac8e4. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:33:03Z), 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/QMFME1983505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cad38064badf28762be8cd13235aee2f4ebc72012a08463bf50a8c4f11eb79e. 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/QMFME1983506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600f0d020b01644dd7cc470b460bd2374d02fa093dc3c98b591ff4fb76dfce62. 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/QMFME1983508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1beb725e5a803630e24e61d17ab5b1dd4dd5b8b55b75f6020c6b8ac9d3375f5. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:48:56Z), 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/QMFME1983510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49a963afca2be5eb45fde178fb7410616e3b9f927ab420f093f960daaad0c27. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:42:27Z), 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/QMFME1983512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e31697a099f780265a1ef14b60c31a4b9532d2caaace268ce37cb4576085054. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:23:59Z), 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/QMFME1983513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fe1ab1bc3236091a3dfa9332b969199c543c8ae69105130c01e9c99c2af859. 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/QM6P42221739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ea4b7c979995f57960511ef419f7f63ed1614a11806690a0095db7972d4a5a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMBZ92393429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02ec7999c4daf803db5887a1845492380baa4724c24701d416117ed0eaa01ff. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QMFME2533865.