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 0x41497b6dfd7be0192fa92d18041ffd30ad2e8841c1f275c41e4b9184679e44f9. 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/ae2aa785-e4cb-49d9-a052-c61edfdc0540.json and https://artists.proofprofile.net/proofs/artist/ae2aa785-e4cb-49d9-a052-c61edfdc0540.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 0x4ea670aa5843752590fd6142ae61316bf37c0bf5cafd8a2f494845c1ba707a81. 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/QM6DC1739966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d14079243e8c8b7dd78335c60fa1e00b81dbb954fab89bc50150af4fb5f710. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QM6DC1739967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdb3305ed6012d0ac6ab60ccf9d46ae7daf48241500c0d06c8b7dff9268ccc7. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QM6DC1864907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438c2eb2c09b0595c63ad6b56d28dec5cb82d910bee489c5cf7e7b1071fc3871. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZES82064628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e81f31ed0ea819a5d0b98dd67a966bcc293240ed377635a62113c59e19b7b3. 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/QZMER2001508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f91c848c0cb72ac32df35d33530e6b9643ab5de50cf9863cb6a40f65131f712. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZDQH2153372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f91c848c0cb72ac32df35d33530e6b9643ab5de50cf9863cb6a40f65131f712. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZDQH2153372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5166762ed0628a476eac1740649a30543deec3e243db83ba9e2f04d4746d9600. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZDQH2260584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca8099826d11d1ab074dac13e2a3ff67e8b6feb28916be95359a19169a80bf1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZDQH2268900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca8099826d11d1ab074dac13e2a3ff67e8b6feb28916be95359a19169a80bf1. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZDQH2268900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83936aeb5aec271fb03b91e2d26ed4fe17aec2f4b2e17dcbfe028fe2bcbe214. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDQH2373633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83936aeb5aec271fb03b91e2d26ed4fe17aec2f4b2e17dcbfe028fe2bcbe214. 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/QZDQH2373633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021330e1cd1e374514675396b6efd1bb91b8f255a74af6127c5a28ce0dfd5f5f. 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/QZDQH2379318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0e3f0f28f15a7da302c2f3d7c2ac65bafcf38425f3dfdfb72d830062415511. 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/US3DF2415763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe477d8244ff41f6e6c392f7202a2f2b4b290ce15bc8b303b604aeebca988fb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZDQH2443528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50db6a90600bb9d9d9e3c7acfb98503f0987b31e28a3bf3ceb6c85f9431930ce. 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/QZDQH2444981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e9a9500ede9d0c1f1e3b7d4c319db9ce38a1d77b19453bdd7c70f6acc43a4a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZDQH2444982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24f451163da25f64e92f64d06167c801b7ca1b9fa1da0a193de25b342fb673a. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZDQH2444984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a22570200a8f20116d4612902acc25899bb472057156ee6fd2ba4652d86673. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZDQH2444985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffc4ae54dda511cf659a5da2b397cc273e4b3bda329a3c087d1500529ea1288. 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/QZDQH2444987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895cc9c7e28f0990816c84a3471dae891b1cd5dd53582c82e241e57bf7836521. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDQH2444988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92b81497acb22e381aeea5ae8b02e87cf1c423fdb1383ce4b9577dd18ca2a70. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZDQH2444990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b07eb80af0adad44382484d8221bb2d0788a75bf9796be2e6dba1345b8b9d8f. 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/QZDQH2511535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfb30918fc483c2b406c0af8bbd6bad274300a2e3fa18a05e63df8e59ec102f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZDQH2531850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9111a14bbd669eab63bc1d406dc207950584188a1827e1ffbfae29403ce10b95. 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/QM6DC1885809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233f38858254b612c74523d9895f6f2efa5526d008161872600724b849a04596. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZDQH2391826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4644ba821f15d820dcf18658b9e0b220bb4937e55844046a5f663da99d55ee4f. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/USCGH2151846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87bb02d66866e10e76adcee41bd4d8d185a319904b7235fbe169746eef91259. 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/QZDQH2396123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa01a8577c4c7d7e1e3f12498b74275abb518df8c6b8e106e930fec479b082f. 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/USE7D2400163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c060a5c8d95f3dfc3d20e55d101b407ac95f0753c9da79a88dec3ae8803d83. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR10S2264325.