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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04cf4b8d915843fb4f5263654a203f5318496451c13072bfdb8edd1ab455e72. Chain 2 (Bitcoin): anchored in block 953709 (2026-06-14T23:31:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7dfb536f-dea6-439e-9012-1a362c293cba.json and https://artists.proofprofile.net/proofs/artist/7dfb536f-dea6-439e-9012-1a362c293cba.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Thou Shalt Always Kill (feat. Pos Plug Won)
Thou Shalt Always Kill feat. Pos Plug Won (De La Soul)
Cauliflower (feat. Kid A) [Dan Le Sac vs. Scroobius Pip]
Subsurface Circular (Original Soundtrack)
Quarantine Circular (Original Soundtrack)
TRON: Identity (Original Video Game Soundtrack)
TRON: Catalyst (Original Video Game 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc538ae02bdad94669ec0a3a8b3782f20a5d2eb2f52d65fc7dd0789bef8c2373. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USWD12537298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228d784b8e0657014d4ae8c5b627925695617753c2e97dcb89444202653d557b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USWD12537299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8425aad96367cbcee35abff7ff31437a0fa76ecd17fb881c4973f8cb13d29a29. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USWD12537301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdff1434c73dd4ff3138992de9f82268ed8ae9a7730b83633b6c28c408deb0e. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:29:58Z), 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/USWD12537303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942b4dcd6245a5dcc5ef72927283df8cb6cc137019f21c15126b4261613d2278. 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/QZNWZ2462434.
Bloody Beats, Vol. 3 (The Sound of the Underground)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2e887c980ff52689c81802c555254cd028a55918954cf1b31f8ac64a3c65b1. 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/GBGNS0800351.
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