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 0xd9774251892d988c2c1ccbdeacacaee16c102fc170dc36093e626021a38ab8e8. 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/7248b441-ad6e-461b-9e42-23615eb6b72a.json and https://artists.proofprofile.net/proofs/artist/7248b441-ad6e-461b-9e42-23615eb6b72a.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 0xcbcca48fd99947619baa3b540b0cb14b87d9e9a4e5f5acb695d4a0c03476f75f. 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/USB8U2301085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbda03d17285c2ebdeb93d8ebc3c01da037355b70863e37114fb58fcd6b8020. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USB8U2202920.
Karen LeFrak: Interlude, Vol. 4 – Clarity
Karen LeFrak: Interlude, Vol. 3 – Gratitude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd56e03452a377eff4c218e577b8c0edcc675779a810c7baa2ac18597dedb670. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USB8U2009927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7721d63c6b9475de3a39a644b88cb69a373d9ddca3ae64741c6f8731b1f7a633. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USB8U2009930.
Karen LeFrak: Interlude, Vol. 2 – Inspiration
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171aecb73537b51e56210d071c34218b2f15661bc4183288bc302ac78493a835. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USB8U2008697.
Karen LeFrak: Interlude, Vol. 1 – Harmony
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb553d5a4b6f37dfce8ce6ba4602f4f93159c0958c9df9926d7bd52bd57a6f3. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USB8U2007473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2c257831720782ab2c309b8687b89a0fa1549266c80c8063229e16fc4e8656. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USB8U2007478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61393d8297cb96e92456fd05a2b680002d9b5bceb0c4961993ebf42f44f300b5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USB8U2300645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbda03d17285c2ebdeb93d8ebc3c01da037355b70863e37114fb58fcd6b8020. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USB8U2202920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52753ca747fc3f169e4e1b783753e5e57495f73894ec1af7313a289a52f68d4d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USB8U2201815.