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 0x233bda3cbf931d33423bd871df5d401e3bd770c0d8b67a1ee27a8078b3c8c95d. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/324870e8-30ef-46fb-9eb6-fbf063309142.json and https://artists.proofprofile.net/proofs/artist/324870e8-30ef-46fb-9eb6-fbf063309142.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 0xdaa765e0a2001996afe797718e32f8ee7a5b7c093c74233d3bbb2b4ab0b9ea12. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6P2452121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812880e26c91746526dfe54676ecca046ef09c5198fcb18309c066b41089fc5a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:55:45Z), 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/QZTAZ2422892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b23b03ce5896d901030d20ecb52c45cc920769b6ac9f76953fa211f013476b. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:51:24Z), 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/QZK6N2424092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa765e0a2001996afe797718e32f8ee7a5b7c093c74233d3bbb2b4ab0b9ea12. 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/QZK6P2452121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3bb6adc84b30fc821d96715d5572692992e287ba68d567669b000e4a7a6059. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTAZ2422893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b924f5c00928d57f73444ac3e2f7a8c603ab2220244429def18a4bd0e1038cd. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTAZ2422894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac9e530f11c710a3829eefe959b4409cca34038273aca74a49d21c72e73453f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFYZ2483504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874b5c99aa8ebb22a4b3f7c375f9afabe7654f6dfd8993a9fb4fc1dd9064bc8c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTAZ2422897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bdb4e1d8dd8b2fab7880ba632169ea35de3f6bfa0d2347d4fa51fdd3c242c6. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/QZNWZ2437599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30aa6f703057b3e373461ccd2192ebc127eb3917be57b327f0c4ddda3a486351. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:52:50Z), 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/QZWFX2524717.