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 0xd2c2b944036c6d3023bb7ad52bd1686e8fb6bad60f3eb2e064019a2cc4b7fb67. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83f69c66-9ad1-422f-adfe-d86dcc1ebd10.json and https://artists.proofprofile.net/proofs/artist/83f69c66-9ad1-422f-adfe-d86dcc1ebd10.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 0x9c9f8b56d1d6e2a408ee5bf360c09ffdb0f3176b996ce25467f4921e28486646. 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/QZTPX2338184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f1e5bb2a13bf3d3d48b878dba831b9806316a8da827726827c7e268023af89. 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/QMDA62277907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff04016d8a76b5c5c4cfea4434bd3515e08097f4160c6fa4de129024e6b23784. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/DEZC62209145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfd2854e6269449cb0c9adce96172bc77404a9b56dfea436c1b0473dfff1906. 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/QZTPX2338187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949a18c30ea33886c0ebd3a9f318c41336d61f8eb206b505827a54f7deb79a3f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGLM2310964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144763cb7e97c53db46d82b22defb934682d92215ce6d11d14f517aa61d56000. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZTPX2338185.
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 0x0bb6fec6d9ce727af55da83414ec393b73b66df1720db2a4d9011dc41cbd1141. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZTPX2338186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6021ea3a8442ff90fad401052e479016df2868b182b1ff00713fb34c3929feb. 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/QZTPX2338188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda56b02e634bc5ad095eacf3930d1e27447a05c5a034ed62b0227e6e4f049e5f. 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/QM7282411632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbe096d928b74a1242c162bd7b6da4bd342eaed3f228717974f1cdd0eb27140. 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/QM7282411649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0959f28ead4370c41ea6fb842b7b095c4bd6b9ca7bd26a661eee89aee0b24f20. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTVM2357744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71848a3e0280715df3f7b4100f035c11daaa6072bd8405382fff09747cbac602. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTVM2357745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64318ee03aded3d9d606ebfd17f2baec7c6110643d9024cf71296aa5f851e66a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZWFK2312908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e567d55a50de2eaea936e829f0afebeef7e9d817c03d3c0c07e33b6405bc346. 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/QZNJV2430879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f1e5bb2a13bf3d3d48b878dba831b9806316a8da827726827c7e268023af89. 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/QMDA62277907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e0fc7cfc029d61c771b2695c6319d9965fba02de2c091483231abc43a22d50. 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/QZW9K2498739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ccdae52dd79d50c5e6d50aadeeb6123d5f647c3afa1c75da4c1225d0014ded. 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/QZTVM2426343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59590d1f9104cc6e3f8c81472d9f5f9bd4a8f343eae2e9c936a2337e4090942a. 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/QZGLS2541332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb9275e5cc03cb1bfcd641ef2b96a4a6d4db2a01a229258b79c42c1395c1a69. 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/QZNJZ2481877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c0ab18153a1a777d3c3e404a9a34f32fb4f996276de9e0805bbd15ba80c6d7. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZWFK2312900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552529e0912c9cd35e7eb630b54562dfdce26322aa49a291f711de3d567a15ee. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QZTVM2357753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78465921b4575eb560f932c93defe40d07dd047ca07b37fd5f4421d792c02d01. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QM7282481597.