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 0x5c861c1323f3b749e70c8521cf260165a0a0294d3b19df4cb9fa2294f1ff96b1. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ffaa5f96-f10c-4bd6-be49-f8a8f64c5d1f.json and https://artists.proofprofile.net/proofs/artist/ffaa5f96-f10c-4bd6-be49-f8a8f64c5d1f.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 0x08f9942889e3121905bb465c3a485fb636c765d457c9f98bf4b31b0f7d37769a. 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/DEY472377039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae81ff048278cff4a16d18d55744f2f0c5f8e3edcf8a2705ccf94b7ac9424275. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:50:11Z), 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/AUMEV2494658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabe351e31304d444f912ef5ca1bc084eedc5ce16ef0891d92a17a18ecff52e3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/AUGBT2467749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc629dfee9c8ff46eae73eeb7262720e9eb9c8aad9509e8851df30e192d1f3e9. 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/AUGBT2486454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691c104ce3d4af230c9d7af9040b459918ff2606eb2a2cbf5a149a5f769024f3. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/AUMEV2562832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6249bf1b9cf713ff737b718f70fac63369601804e1aee67015dcb7312168ebe1. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:05:49Z), 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/AUMEV2562841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800995db6d4f6d23e1223bc74b6a8556f1a05a0a05da6b2ae00a9b0b55d3c6d2. 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/ZB1OS2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed64bbf36ba80b73f998182fc3a59b69eb049d6f2dbbf4ea6d28d64f451c8578. 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/ZAEI72400182.