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 0xff2d4cb70a32549fb6e78cdb8b851dbd8e8ee7a7f8afe4058701f73295f75c9c. 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/ec11732d-26a9-47a5-b188-41b9774141b0.json and https://artists.proofprofile.net/proofs/artist/ec11732d-26a9-47a5-b188-41b9774141b0.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 0x20bd609ecf5ce6c3559085d28d8eb10f40c564608d002a153267b9403b593c7b. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/NLP761500138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed523ca002298ccd91a7cf333a8fe438c4cf0f30c6432d6a9826a024cf52920. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:05:20Z), 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/NLP761600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25057435bdca0dd1db0d09b5c4c2e55333bc579a3935d3cd123458cb4b00f345. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:14:03Z), 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/NLP761600058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9215eee2ce46e16277c1fa5af0f0607df4f80bab04b889949bc88b1e58b9d175. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLP761700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd6e446f5dfb9c848574442f3c5d7d678bc6ae0471400eb23d159d056c151b3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLP761700116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab023649960e2cdd2400762301ded3860c664f9976ff31e711134bd7ce2a1714. 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/NLP762000222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915a71e8c047aeb738fdabdcc4b611588fbbc7abc1810ff26032020ec609ede7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLP762100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5c33d538a52776052f9ab4a769e15876ee4a554c401b967430bc8301d54a64. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/NLP762100073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6919384341ebe7aeca9b85a169626d20432b64b61f3e9e2c5b2f0ac65620e629. 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/NLP762100206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec968c03e69c1c2b7e4238cf231b4bbe75abe1757da178fe3a1d09cff81beda. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/NLP762100257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71c1ef12c684b0199aa31fe96add9caec49c31a813e593f2c1dccb8cbd17a41. 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/NLP762300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13136918f30d71af2f952b7d5b322ebf181b45b0f8e012cf2c6feda49f412efd. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/NLP762300131.