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 0xbc4cc714b4d322a00f8cc8d0f5790cda1ac1889680fb214b460c07b38fc81520. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9f7f2c0-a56d-4c38-81ec-233503f025ee.json and https://artists.proofprofile.net/proofs/artist/f9f7f2c0-a56d-4c38-81ec-233503f025ee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
O2Jam - Cycling (Original Television Soundtrack)
O2Jam - Orange Wind (Original Television Soundtrack)
O2Jam - Over the Horizon (Original Television Soundtrack)
O2Jam - Reharmonize (Original Television Soundtrack)
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 0xf03c8c763cf8dffde7430920ead60417372c8097d4f88c894228b733df4787f5. 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/TCADS1872257.
Arcaea Sound Collection: Memories of Dreams
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe565055aa0302f6cff366148b34d5fb575ea20e67ba7af5742dc3296c5346845. 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/TCAGF2265880.
Arcaea Sound Collection: Memories of Conflict
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ff074ed4a01c9a2218b4e25a7d16ad74de4d185abd7fcaccb94b22c64b35f2. 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/TCAER2055594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16baa68079d8816247ed1a65ef78e93670d56e0351ea91b787354a44a85a715. 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/TCABS1321998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7ada3845fd0a30fe8515f361dc89363cb2e2088a87977e763f6a25bc8f7bb5. 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/TCABS1338314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d58bd49c15906565c5f299895508cc17f00346f068378d36376f59ea381307. 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/TCACO1699113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ace87d71afdae919c2db164079acc1b717f775e29048c383ee16ad28d40c22f. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:03:25Z), 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/QZMHM2418133.