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 0x44573af2093056860fe8e9f2ab20fb27294803a56368f2512b5b20defa676515. Chain 2 (Bitcoin): anchored in block 954062 (2026-06-17T07:39:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45ac5120-820e-41b6-b0f8-ecd3a112384f.json and https://artists.proofprofile.net/proofs/artist/45ac5120-820e-41b6-b0f8-ecd3a112384f.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 0x839b8dc7b403c85351b789226a5faa1e38bc7e3c34fc5c0ceda3032465fdbda6. 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/RUA3R2116032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf288b04a674f4e9bd5370678aea0302e49599c79fd25c87dd41f7bdaf27ecb. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBKQU2438006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2346fa1837bc9e25aa39e9e8599e7434fe529f9edf703f9b5eaae180cf8df2f6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/US83Z2351464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c55eb63e67be937d51ade09d5c939b13c63c83097e42788c1112982a6908901. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US83Z2341969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215fe8d55857d5a5f1f6a4c00f5e84bf998e0e4ecbddc39f1cdc9507afe671c2. 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/GBKQU2385719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c78930910f1b9d654f1c8ea92ee5d9a4d54a6ff918f33b177e5178c2fb4803. 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/US83Z2330095.
Presente Ausente - Marching Machines Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09eea5ca8ffcd3918e1ab6f40746e3358c1f4dc44d973c151f15b463557d7b11. 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/US83Z2330098.
Biscayne Boulevard - Jesu Aparicio Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f501c7bc8e47f972e3c35976bdeba8ff46241737d0a3af668f3c1b4b068017b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/US83Z2239227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b160f761f2ec43422cf4af07062eebb7ef251d37e735362f3743e8f3e1585b5. 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/US83Z2239228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96075027ca45ed0af1aacc2500f2378c95134e3e9e514f95212aea464965e25. 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/CA5KR2240857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442e2e8aa3d21d6279d22f4ade408afc77131bda9d9e9e909fcd37f8851b9d9c. 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/US83Z2142292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062b80a8fa10aa11a5fd709085304f515448a81a9357ccbf0926308d46db5e50. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US83Z2411502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf036b4d8466521121b9626f18bea3399312fda82e93b720a6f26170b8ebc78a7. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/US83Z2411503.