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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b05ea8c1df88847228db6d17612baf262b14537cfdca3f97ca974fa666e1df. 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/a13d87fd-04da-4ec9-803b-ee057c2936b9.json and https://artists.proofprofile.net/proofs/artist/a13d87fd-04da-4ec9-803b-ee057c2936b9.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9b4e51618b5e82444b4ffd7a200bf1ce1c31f0f311248f199ddd09dbf029e2. 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/BXJM82400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820931589d9fd875b1ae936cb55292ad61bf9f833f2b3b72bc69cdc8dabdf05e. 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/BXJM82400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd4cd99334a70d7079e6143e1585cacf3ee9b64e807498d7af38a723cd9b3e2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BXJM82400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc7020c153dada5ef9a414d5407a2af6bb131fa1e4ed8277b00573290b28cc0. 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/BXJM82400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1550801e9b347dae53fd034e3518e1cff0ab656aab95be7af1804be1c234529d. 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/BXJM82400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d69b9eaa2db7a74d14dddef8d9d16a9cf1bb5b52c0a8801a26b623f38766cf8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BXJM82400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9e8f3cbbc91a2ba04094ad2a1c333e7fd168ed5a0f12d9e550d7e5c8026fd6. 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/GBLFP2379454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfccee282d7bda9b4afca6b7e175219a585e64bfea48785a56bef57d6f1aa5de6. 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/GBLFP2379455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4634ce9365e0750be77eb7fe5a0e4a62dd96679fdb133972deadfca3fd42917f. 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/GBLFP2379456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4c45916042ca370d5408b94760f72871082edc74e62adb248feb9d02790079. 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/GBLFP2379457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce031b53b8f8406e00ce6eefb6a0382e267ae8715d2f15a106040720e7f9c7d4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKXN22280481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149f4b9170e884f60d83ec6c0bf0bafd701e557be0341d91f6e7654f282ca1f2. 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/GBLFP2379458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce031b53b8f8406e00ce6eefb6a0382e267ae8715d2f15a106040720e7f9c7d4. 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/UKXN22280481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39ef8d23cb5666e27749c01b27a18a766647d1c64c2136613ce8f4c23199ec9. 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/GBLFP2205600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44f95f5e7e43cde9f2a3b140f64b49782996148f3faa5e858ab1d6c92ff4f47. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GX53U2033666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbf24b6ab1ba8394e5b757c0b0d3cdb4fcbc3e6402dcb471dcad74695520f19. 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/GX3Q92077733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d841ce1a1496219685d4f728930c8943ea5948d530c4dc2ebd716246939d1d. 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/BCBL92400461.