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 0xdc862ba9f1122255dee11257978f9464e76346c359442bbac7a96c71f8692cae. 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/b8897791-6176-4ce1-acf4-60c804b09cfc.json and https://artists.proofprofile.net/proofs/artist/b8897791-6176-4ce1-acf4-60c804b09cfc.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 0xcd31cdd6db33ec7a460026f4bad3ae6e9ac038755b25ebf01ed8e0802018908a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ITG372400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fe07b72f6c14d878e28e30f596394d698a91ef7e4a8c3bd75c31a67a56dd01. 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/ITG372400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9a34c813338e0583748dd6fe6a6f10be7d094b8b8d4224b3eac545e9bdb541. 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/ITG372400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8891ef286cf57a0ead7aca190892e18ec402e9ea6c52ff8706081544c87c914b. 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/ITG372400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bd931efc6be4b03cca35f2d84a07cae6afa6e4d395c83c846ccdf3f4759893. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/ITG372400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12a8296f4298a7c2a5a35b458103bab0facc67fed61bb31c15c8c0e0525e3bd. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ITG372400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78da03a83346bb54c78be5721fa4d4b35e3983c2bb075d49c0e091ca44a3358. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ITG372400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91ec93048d54fbc16a4723a51d17779a0a45abd35f00d4ae5f2425c6dcf73ec. 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/ITB002100408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb3b2324a3f484738f8e0af1fd154ce2ecb5d9bff3e379697abb4faddb77c97. 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/ITUM71100605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59802efcaa9a4e0f872495a28e738d36fb459ba1b039f619d2ff7205ee89faf9. 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/ITUM71100416.
Dogo Gang Presenta: Benvenuti Nella Giungla
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49ce58ba26e47f8de91edc44e0ab5265055a1a21cc0c2cab4b8d41e8134e7f5. 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/ITL560700032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cc132872c0a4baa5023fa1eea9e206a7e1eb626aeb08684b6604b302405632. 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/ITL560700037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08835983633be7b8c3c13db085e8acc5faa4703c3fe3f5763edaefd768ea53da. 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/ITB001300312.