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 0xe171292f34764a93a871e593df49ffe2110ee6a66d9367b218930fb8affc9746. 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/ff6e4ab5-d853-4b0e-899a-2bbbc0d0e323.json and https://artists.proofprofile.net/proofs/artist/ff6e4ab5-d853-4b0e-899a-2bbbc0d0e323.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 0xc9a14493702d1576377df0fab5012ff2618fea2987596b7581433dc3f3a96d44. 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/DGA082421891.
Artery Gear: Fusion Original Game Soundtrack
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90173fbd8a43c4c97c3a7abc67fe9ab1f36f6ac1e9619d9f71c897c2e392fb49. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/DGA072348655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e97cf1af0598dfb787a23e78d663c248b14f1fc2604e7ad0c015086ff0b871f. 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/DGA072348656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a327cfe6b08aa67b217ac0d99fb11dd259fd8ba416555a28db0aa7068e3b32. 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/DGA072485397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488be568208f50901a5ddb1f87ecc07e08307424f0f3d6bb5c8741ffb62c824c. 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/DGA072456757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ead8c975bcd6a2d5739b20e219f0781d75fee3ab42f1c2d6d3999c6d0b60b6. 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/FRX762217686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34390fba9adc26934d3c58c2b3a477a7c780403e61fe1f8be0e3eba1d2054385. 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/FR10S2273932.
雪浪映花颜 (少女前线活动「雪浪映花颜」OST)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6790dcfbd30ebc89b6231bf6d3bf441799374c6e17cd7298af7bc2034ffd9c. 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/FRX202381676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d7046e172c133bbc8f8db72b2c2b248cacf27eb8f4f65d85fc2cc3910027e6. 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/FRX202381680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff72d8f9a7b98dacb1c1d7ddebc1ecb94c53ac88a93ffb01a628303e9bb8ec0. 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/FRX202381683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbb34751440576e992b8b1d9d78cef587b11c4a4eb682c4689eef519da3608e. 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/DGA092439200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1346657d758e08079caf2b6505b639fb7fda2c66d692f60b67843eced48a2e32. 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/FRX762298077.
Convolutional Kernel (游戏《少女前线》活动「卷积核」原声音乐)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d95f650dea4519e8aab575e126ae5325d36e6eff888ae2d080ed3f1eca62cfb. 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/DGA0S2483314.
1 2 beat - 游戏《少前2：追放》活动「心智洄游·素银匿信」原声音乐
1 2 beat (游戏《少前2：追放》活动「心智洄游·素银匿信」原声音乐)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9007b497721ce3cb85a13e385723148f94784702cbf90266f7a44452460c789a. 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/FR59R2561905.