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 0x88eb01733792620c338a152b3ed362531ae95593bc7f1fff882d5428e9753f94. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4555c9a-4e83-43b0-bded-f6a0aad8b16c.json and https://artists.proofprofile.net/proofs/artist/b4555c9a-4e83-43b0-bded-f6a0aad8b16c.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 0xb102893d42174ff44e3883b53f76dfa8d2a9adb2d48622bcafa40bbd1ec5fa34. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/US7VG1627943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66e32d4f64f3a0da8aebaa4e0a03aca0d852b0158c6440d9cfa1eadd6f627d9. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/US7VG1627944.
You and Yr Friends / How to Build a Girl
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99228def3f209aa227ada998fe41d1b072a77af2cb92ebe46a16a368d301662. 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/GBSMU2926653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a3d50d2fe49fdc9943452ab7f3b637dc6523dd104d04b9f508956200ca870a. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/GBSMU2926656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13cbf6ab69d5e69840c3cee7fefc4daec2d1dcb0c29505312855bc24a04dd357. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:33:36Z), 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/GBSMU2926657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1d927c05b1fe8fb6eef91a0f75699e8da34b0fa97a86aca7132b92bee5e985. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/GBSMU3067906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6ceb2e29a42d1c4f3c51610e19ac17cbaf187f608b03cc8519aad24db075c5. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:42:08Z), 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/GBSMU3067910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7b1229c08cd5ae43bfe0350649235194cd634b84e57c3f5e43c901254d6f7b. 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/GBSMU3067911.