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 0x8d401cf261efbd4ff15a9e515ae6345710589584654c3a8766e5d9500668a22a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90a5b353-e88e-4ee7-94e3-1131fcbefa54.json and https://artists.proofprofile.net/proofs/artist/90a5b353-e88e-4ee7-94e3-1131fcbefa54.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 0x62dff049da3a56e6ee614fb7120b031e6404272df2e2e6cd39533ef939e958b0. 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/USJ3V2090639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c376c12ccc699ca694baebc55eeb065b8d7e778821cf826be9783ecfa8dd43. 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/USJ3V2090640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8ba918421481187970517bbc368767d5777c35b93874472d2801ff88e92eaf. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:35:16Z), 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/USJ3V2090641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66243f1811d9e089b5aca3f1199ac861ed013142e4a31210a02541b427bc98b4. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USJ3V2090643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a91f108079a57dfe2319402d0d85a5203f165763b3317f954ffad5198a128f. 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/USJ3V2090644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd7481894f3ea2617e6b4a542b3bc0f392216480f73f896a5e62f3bae606279. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/USJ3V2090645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eace0c804a048eeda7ae49ae59713f8b79c646215708bc542d4ce703f00d67a. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:48:46Z), 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/USJ3V2090647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5f3cacf594474f471f62c36bbb563a787332cf16bc55700fa937884c3e0ae6. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:33:48Z), 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/USJ3V2090648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06c2e59ab5f513a67fa20ea8ea704ea4bb183bcab464cc703d55fb3f3711105. 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/USJ3V2090649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325d82304741a5f097e75c3d6915165e732986b7e763f93b3879beaecb7b496b. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/USJ3V2090651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1a76eecd9575afd99e49a5155632012332ba563c5e5189cd67b9ec20e56f01. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USJ3V2090652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89e496ddfc0cc07f5378508d5f25d55ece4dd2ef42be179d98c14f935ddc4bd. 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/USJ3V2090653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1726695e8dc193c9a8ab44a6547788dc39558ebe0f448448bfc3c9234ac415. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/USJ3V2090654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0302940b5ded1a2b92d5dc1412714218f6181bbf683a47b8bea5d236cc40f19f. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USJ3V2090655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707160c447b994addeb97d2175950bda596f75535055897d0eb87107f6d3119a. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/USJ3V2090656.