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 0x3b175594719cbe7b8df9bb27753d2a3527499b6979db6f2eeba55e5c04ad85e4. 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/df55dd51-6a40-4f2f-b09d-9e96ae4019ca.json and https://artists.proofprofile.net/proofs/artist/df55dd51-6a40-4f2f-b09d-9e96ae4019ca.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 0xcb95f3bfea88b27e84a64069498f560e6abe92fdda7608f76a45d3102f0f6c63. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZDA72226086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8262111fb2086ff352cb7922b6e6dace60fa41bc31d7d6726ff4cf7ce5727de. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZDA72226087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0046d9c1986a19f75f053306359b76b55b8ee05de30591c4460fe767f51e4e2. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZDA72226089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f531dfbb05235e0ec387ffd63ed552285c416a972a98d813fd74492ac4a2800. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZDA82250764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a7bf4397e919cd97b67217df1caf3b4cbbda5b9e4dd028415c86d3a571c663. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZES52220111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479e96b722616c182fa9e4886f47db0b6b30ec29c14d7bf65d11bea3dcefa540. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA82369072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebae6b9c9ce2d497e87cdf263974540e36f778347bece51265147be7a083da4a. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/QZES92375503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9813bde51274d961fcc900ce23ff3c1fd9dd0a05390fc35d04f4a95a2a701e98. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZHN62337411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e8d8883010bff9830dd586044163dfb5f61846526ec43df474848fee4e9ede. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/QZK6Q2309004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640ec6c40ecf154faafbd0bb11131c61e26a10c12cf5e98842542f3712fa8916. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZK6N2372802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8d4da550507c1e5dc73b8631c06bf9147a21d6160d84538acd038b56185c43. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA72447394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142a3cd100a4278e56fd38d56201d055ae6f7b28766c9917e53e7c4cf04e27bc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHNC2491521.
Drillenia, Shank of Miquella (Elden Ring Drill)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e60bc67807338d713f536ee66ea77179f91b568b2ce4d55aeb8c137fd3dfef. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWY2415246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7a355c9acf541bf537d38adb95759a59fb78cd106291bec43332f8821f25f6. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/QZTBF2492465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd733d1d472ca464f28e5416af0a99307644595f7ff1caabc83fa056de4fe6849. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFS2445999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28309079c84b2217a323fb8a15e694e146c91c0e153f58c61dac69834b7575e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ7N2429955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085d9a0de4f031283ba5fae6a3a2d6dbfc4150d34e7ac022da85be20058ceb2c. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZNWR2541334.