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 0x9ff6f62ff27765c823b7130b0f627299112fead3a002d41da759313762240c76. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4589f92-8095-40d6-9007-732c8837a841.json and https://artists.proofprofile.net/proofs/artist/a4589f92-8095-40d6-9007-732c8837a841.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 0x2d875f3e9b2ae136eaea21baa66348f026f9875396de698881c1b1693eedfd15. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USE830944895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b01f17cea6c8155db843752cd3b69723a4aecb50b79316aaa5185c470a422b5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USE830944896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e074ac6ca3e67f76e73c046798f564ddeeccf46831c575f14dec781eb603d3e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USE830944903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a4bae7716489e134427ae35f02f977c28430eb406eef8371fe9b276114fff2. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:17:25Z), 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/USE830970270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c281c850aecd503f9ddfe383ba7be0ee936b9aa8b29218f7bf8a769ccba17c. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/USE831535980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f0113390d04bfd2e2fbf0380a2b10696fa8b63f950ab1e9f5425797851e377. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USE831538131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eeb91d9687e043cbcd52a44f6a50f14fef991a93522b4330e80adab9aa90de3. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/USE831541493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2a6d17e20ecb6e7599036bd1194d4bba48a76c445829a541034e88f1055e02. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USE831553577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62bb89dc43a5166a973ea43b895d58a7582caf346b61301904b165c7e5dd753. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USE831583539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8be8f76b0e1f85962994c896fe81cf4bf7682f30420a4229b8841eef444af31. 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/USE831594793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a34806a1a9190af3e7dbcfd4e2bb5f81022da1aa74bd75a3d90cfcec9d7c7f. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USE831597637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b514ea5e6e6ca77288505812c13e03d1c1c246792e35345edf40b049558ff7. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/USE831597649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59530d26f55f8406db24f24316793d617aa0912ed57eebb03bf807cfca4c3708. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:24:07Z), 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/QZ22B1884705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d969dacedbdc5e36a48d1c598c43274046a89f44b3fe80bf8c8bbf4e7062cd. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZ22B1884707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56124c816bbbc56ff6545931ad24235dec9968f53d9db6c7f63250e0a93125e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZ22B1884704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59530d26f55f8406db24f24316793d617aa0912ed57eebb03bf807cfca4c3708. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZ22B1884705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa644ce47d4575fe56f1c2f280af59810e4e878e33d276c226c9241294c07f6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZ22B1884709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29244366fffb86ffab50380ec1c075ee24d8f719842a7f4d4c79c9e65a1104ac. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZ22B2030201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e858e8fbc32b48f779d519bf84ee99140c63175379012b1d0d02a33044ceb0b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZGWX2108142.