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 0x26d3b6ca63382cb85f3b3acc23a1ff12151b535c0edd592cd51c2ccd833a0ff1. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d85224dd-35a4-4f1e-bd57-ec93d5febdb7.json and https://artists.proofprofile.net/proofs/artist/d85224dd-35a4-4f1e-bd57-ec93d5febdb7.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 0x98e156475774ea4724dcd55820b019b70436e566c0dc16026d6337de9e2ade1e. 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/FIGRF2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0171acf007d783239cbfadcea83fe0a9607a4939b14b3035227d11ee612d7f2a. 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/FIGRF2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4553b59d34a41b319eae0a913932c8020354fa45104f565a8aed5f8f19cba4. 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/FIGRF2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c8686cc8539a99e551c3dd6bfadd5a9b6200526928ec7fe151ff01f07d6b9f. 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/FIGRF2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4f768fb759e937ecb20c2f56811e91b710d8740dffb4bb759409c976c91490. 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/FIGRF2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d872b48a9ba34916b923d627c3eb35225792e92c8be04457a154a5e0560dc5. 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/FIGRF2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc5eb3d545ba4cbd3f79670bd439a0ac449f9a72c358b2e0f42fb8f05253893. 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/FIGRF2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326a54d279eb2a436896fe0a30734e83450768871f517cdccb149a622009a7a2. 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/FIGRF2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a029fbeafe185e626c91db005f6ee27f214a121fff4531515c5f8e844cd8dc9. 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/FIGRF2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769b0b30c9666143100a41ac7dc08020fbe9ece2a431f078cd55eec9874ba226. 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/FIGRF2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c7a77efec3b806fe4652775cd148f12679b4f3f197df0bcf068a7fed386998. 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/FIGRF2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a2db553fd762c40665592eef32a24c3ed46ffbe57f1b400f230bf2653736f0. 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/FI92K2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e156475774ea4724dcd55820b019b70436e566c0dc16026d6337de9e2ade1e. 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/FIGRF2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a2db553fd762c40665592eef32a24c3ed46ffbe57f1b400f230bf2653736f0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FI92K2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21116c7530b104c4e1b93777c075ea61b71a0d2196c015f1303792ed7a27a7f1. 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/FI92K2000004.