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 0xffa448c15a09f90d4dafa4ebe39b2de63d1de5368a83d4ac92e0c3fff6736568. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b14bcd3c-7743-4aae-a478-d06a25b25696.json and https://artists.proofprofile.net/proofs/artist/b14bcd3c-7743-4aae-a478-d06a25b25696.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 0xfdcac9fcc512a66064034ca164cf4512b30653613f6f5ea77f0d8ac93d659c1a. 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/KRRAR2421203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b8322d6407f9e294b8388240b23a618f13dfbdc11af2f683afbf30ec7a0d7d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/KRRAR2421204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa033e9292eb82563d93068fe9bc1cf7beb3b722904374dc292d47c89a7d56827. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/KRRAR2421205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9851623058af3e3577bd882368d7c61864ff8e478e18c0e62033ffc365ea89. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/KRRAR2421206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5757c66e313ed116282051820169759720c3d48b44d98dd592dd9f686cb9b214. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/KRRAR2421207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f46d52ca4edb42c4977379f3b0691d7d6688c89441cdf9894b100ed580ea28. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/KRRAR2421208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d0bc083a20af87522719d3ff89bdd0a22d5ac6ff0f64a70124014cd02c998b. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/KRRAR2421209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65313b78b7fa07d17c70f3d0ef83cc51fab89fde13f74b2649d668ee12e4ac17. 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/KRRAR2421210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6e3b795c1a36c95c9922a45d27ca4e45301a721fc181984f6d2cee7452b834. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/KRRAR2421211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29456fd343e9cc1f2ad47cc612f2dc2fc250b3f1cefb4f2c85847ca135164014. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/KRRAR2421212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494942b131e5753b0b24d67c61e6840a9e572359cdeb04a3c16c4f4fb482416c. 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/KRRAR2421213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfac9af9e724d3c8b9e8ebe116f3e5f6b657bf49ed79e487a5f367f6f1c73b5. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/KRRAR2421214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7500b5d81aec2c65c844423bba7dcc38b0e0564cd2fce0e4770414c1cb97ecc0. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/KRRAR2421215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90c089bee5469ff7a69008ffa7ac1e875ec32fb242597b2a8f80f2621c1b075. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/KRRAR2421216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4ea7e23ef0051911476969394ed00fe60ae0fb1bed9bfa561f63acab896e80. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/KRRAR2421217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ae9d5b8f56a1bc21e8d6762a281d42c8834483043bed6b76cc93b7b864486b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/KRRAR2421218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86672579768a9ddc7b32ffde030ae3c46f47f3ebf49b95db5e10c2b093650d39. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/KRRAR2421219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a72181680d5443574800ea57945248e27122fb2d895b052885289a1701ecd32. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/KRRAR2421220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905c960668f30674ac1319a9d8d14c581824648ebbb91cbdbbdb3a99f95091b9. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/KRRAR2421221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719e7903fdd7c7a64243d8ac21d99b922688fab45ca3aa2259722f5bb366a21c. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/KRRAR2421222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a52dc2d55ba6c12f3ee5ea8fec500dae4cd4ac14e369c7586d051c045ec5d2d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/KRRAR2421223.