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 0x11cff03bf121f034a3c13137ed543fc276aa6fe37c99083703648131638a01eb. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d748cef8-774d-4824-a751-31bcb1028680.json and https://artists.proofprofile.net/proofs/artist/d748cef8-774d-4824-a751-31bcb1028680.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 0x722d8cbc84ac858a8b947e740dad0279803e87ff6e199edcc28df15116f2b4c5. 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/USL4Q2071029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55660abcd57a38f08c890b8c3e00735b9fa8bbe0999af7c1c494c9bbd92b1f6. 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/USL4Q2071031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee8f3ae73e4722baae4fcf8f39b5880aeeb772149d78077194c1bbdf12263d6. 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/USL4Q2071034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4078a8ebd1a170c3e40e6d3a2b6d74c8b60b7accb2ee01165be36375c1f40610. 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/USL4Q2071039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15448577e45bf5ab2e89dd0b75fa2c12198af85990386ef8f4e59b643b5ba622. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USL4Q2071026.
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 0x316ea90ab0fc60f98e936acfe021200763381dd23cc3d74ecf18cda72582c390. 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/USL4Q2071027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefda609efc27d459462ba38f72485ed84f81fa47a13338bd360509ba2c825635. 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/USL4Q2071028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0601b47a7502b539f4d9b4382ac26a480b9449075ec0260031ff089e73864f74. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USL4Q2071032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6757906f95f0dda3e674d2e6c7e7462933f9d18a67ef6ea701dd040095f7db. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USL4Q2071041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453f911e2638103bae88a4fa002b95c9cbb8da27fe23fbbd63b4ab31f4ac0b77. 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/USX9P2001323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae0433d692c2e56b07e55281308b71ed1cacccff50f1f88397004fa5f918c43. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:17:01Z), 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/USX9P2001333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacb83c3989ae74148eb1f9f27fe07bde1498dc920f28bf43043847dd3c9ed13. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USX9P2001324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1662334037b249e7c74f62edfcd17f11dc5621ce82d10eec6cc42f71c4474592. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USX9P2001329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026d51603cd597142a84038eb5217ad441cf6df3034a55fbdfd6e06f0b8ed11a. 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/USX9P2054975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fad9b0949b5715e24de238180fb5ee33d91297272fbd387c5a7960d1bede0aa. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USX9P2054976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4ce170a440c7a690a310b1af982ad18798a6f00af2fb4bded8351bf1b936c4. 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/USX9P2054977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a6415b000f012cba4567f1a13112ca71723e04dae215f4682e0fe7f704bdb8. 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/USX9P2054978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f089616f3b4e62a34adba66f6f3ba5997fc660f090d0d57f4c479c1cab045b. 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/USX9P2054979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492010823775105c948bac693276901c93a9b33cc21ce3119c1e6e5e9fbf1485. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USX9P2054981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89483315506c1d4855e5f33026ba2eefbe6ebef8dd0a7097b48fc5665a36c1ae. 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/USX9P2054984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4aa52203a7a51c94620b6155787eeaaa6bc9fbd5c2ebf32727fa51ca5e39f2. 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/USX9P2054985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0419a85f721d76bffaea40c4d7038c67519e233719d490ce939b1ceb0589e1. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USX9P2054983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa635d19ad35c18ff797663b67333a6ffafc0e22c75c035b2114f0adf3091f52f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USCGJ2228534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389b77146d324b90f7d1c95d745cfe8b7e96053009d014d9271b9e9aa9bed2a0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USCGJ2228535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6780f756a0da3145fbabcbde6137f57f1141248ae918fed7baa78e11fab2e81b. 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/USCGJ2228536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff9fb30b46df82916d8be71095e2498a63e473951a0bc73e7f9de8a96cf7ea5. 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/USCGJ2228538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66193975b25f82de533e85124db56c794c7c616bbb658802c402988f1ab36b9c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USCGJ2228537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285e03ed0bd3a2d05b98c83a5b0b5f7bdcd51a5981b767d36c62c7b4b1d91636. 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/USX9P2028756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42960c077236dccdd7a3b8cfc6f895ab8a51c81525a0b2b57ac4d02110e4ad5. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USX9P2028751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbb7d0bada7546e099d0fc0383ff52d2bf4a232b9efb12a2e4b037895149fca. 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/USX9P2028752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253ddb0617468fbb108f2657c9108b69d825e764f5384cfc4d136da9c9d82107. 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/USX9P2028538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e7ca3bbe93a1957e433a55b1c15076d8809f978cf3f8d95a36cf56309ee8ad. 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/USHM21833187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b34369c5971c1cd621f2f64421480e6ef26b5c5c0ab033ecbd191de4b45d734. 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/USHM21833189.