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 0xbfa15c6b7a07eb103c1e3ff7084d9bbe5083e8e4b27a0b4923793d801464b8ff. 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/519e3621-6f0a-405d-a6d8-b07f59a7fee7.json and https://artists.proofprofile.net/proofs/artist/519e3621-6f0a-405d-a6d8-b07f59a7fee7.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbefe379a9d3ce4df7e9205f4ebcb44e6728447aa182e68d639706b7db8aa613. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAFF2076551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5c2589261b825b1605cac608eddce8c502f4b3f1527088343a07f573b42d90. 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/FR8R62100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb48c5d573946fb335c2e9b593a936a7b341af20d41a5cec6d170bcb240fbb32. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FRPZ92113950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0b51a5897936da06c7655601dc0863cb1436ab46ba19dcebe6dc4cf1375822. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:52:34Z), 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/FRPZ92201710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa482eb00b60a3eb704153d0cefbb2fbffcc706973db955ee700f4e23e194493b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FRPZ92330030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de41184873f5d309cc3e71236b2086f0994d236e775ebbab728ed1e2b1a7bd8. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:33:43Z), 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/FRPZ92340400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbe8575223304aa70131fdf0ac75b9a91e62467ddbf249c193d65187ef4cac4. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/FRPZ92340420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641251d8bb30e18896c2fef060eb84075137499b02811374406ea1d4505b4327. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FRPZ92340430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b8eb93edef898a485a9a0e7e4096571cfa5e6b9ef79d90cc849848a7f57e2f. 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/FRPZ92337570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605c735f9375af35db5d6140c684e1e945bd7deabedcef2b246727205d095cfb. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/FRPZ92338760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1da31f0127fdb644a70ac2ba762debb0b7906e65f0fd6b3b1d7295d8fbb5404. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRPZ92523650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c9a4f53f314e8fcf34f2c604fdb504a7cdfe590d7b5360f4cb6121907a1afe. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FRPZ92523670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a63ad418a7600511dc6a0f1498b774062db1ab5153fafeec20560d98eff2552. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FRPZ92523680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275507431779f1a8df27f2b9fc1186d1e512d46d727538c6faf30251066cb81f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRUM72102322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275507431779f1a8df27f2b9fc1186d1e512d46d727538c6faf30251066cb81f. 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/FRUM72102322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2232a45ef29b9f176e98d852b7cbacce4637f27bb76acba7de4c5aca13a135a5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR9W12331075.
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