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 0x9cec7189b5192f495ced87823f814f61e28a5f7db4f7bb4c31c6967e8ee7fca2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2bb27a45-fe5f-4d89-88ab-0e31ca13cebc.json and https://artists.proofprofile.net/proofs/artist/2bb27a45-fe5f-4d89-88ab-0e31ca13cebc.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 0x0391b05c5d0d839c6841f1fb15b7fea7b1b387283509b7f4a7ce3f33a59d4f8e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKADG2200177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fbd4cc0dc02f82a43eccb8096bdd21017f1e12b009bd0ef963f8441f202eff. 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/DKADG2300653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc88b1465e9ffc27fb30ce6da02c311f35c683a7d1601fb43ee1a583d5a7aba6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKADG2000341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fbd4cc0dc02f82a43eccb8096bdd21017f1e12b009bd0ef963f8441f202eff. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DKADG2300653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9993c0017f2f0e59ed9f9a93961eedb26a0195903243724f0ea3eb81d6211e08. 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/DKUM72100292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c72e33f025ed88f1888fbfc6060d8d9ec6a63d5ba07030857c09da3d43d7996. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKADG1900304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b8845a66d38854de19e8e153c28c12daa8aaacb7f127f7ee7b5db236bbc490. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKADG1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee102cc38256b4a2f15c907417110bdbd6430f5a86eaf0c5fc278a5fa9299e3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKADG2400373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682170ba0756a3d9621f86de6828d265b713859f374a8aab0f2645d84cb7c7e5. 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/DKADG2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e0ad3b339f3ded919be69c298c921a2f4e91ce01fdb76e9748f9c4f5b3ac62. 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/DKADG2000890.
Handsome (feat. Benjamin Hav, JOSVA & Gilli)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1471663502130f359f5d80d774d37b1f99744631cb181e75f7db4c80ca582f74. 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/DKUM72500206.