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 0xe84ee54fa6b107def8860923e2c61166875803984a429e1874e92e01f3e358cf. 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/f07fb45e-1314-46e4-b482-eadd1b655943.json and https://artists.proofprofile.net/proofs/artist/f07fb45e-1314-46e4-b482-eadd1b655943.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 0xaa13d781e022cfa72bdc4265d9381aaf77e8197c15da526c29b8ef1b49a6b6e5. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/AEA0Q2185608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758d3232428a76e8317c917dd2e62b069c3503ac18b14b4773aedccbc84523e5. 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/AEA0Q2185609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f3c2d3093f789763204bbb6919abc044f5a52842c01672e0b362be50244c04. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/AEA0Q2185610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ae6ba5dbe5de3064d2faceba46aff10ec060fecbecf9090e4707509255ac4b. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QMDA72151216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe965410afb040d1397f94a05116780fe634562bcc8a149c46460e34cce3fa536. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QMFMF2130741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d52bf2fccf046a295baf7b795e4e460e91d56e31991d8b4f42b6e3713410d52. 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/QM4TX2266331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c99cb1cf062ad58d07af980825d98ca81d5ed80d5c57da296414c68c7120dc. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/QM6N22287358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf5f0ba8ee7009d064918ad7bfc6122b09bc56341ddb0d480eece1f3d1fb41b. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QM6N22287359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff87156b37663b2a558561298e50da25c5181f551bc83864f8c89d98e7cfae4. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QM6N22287360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e9fd176b622ec5f67d9476fbce3981a6d6a2e4e7e2b9073e461c75a9ee7821. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM6N22287363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395cc3b7a157cad5700b5a5e3157bac7ba2e976193c4b8bdd8c489ab90f76f3a. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QM6N22287364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9360931be826359ead17dabb98595e31f7ac23becf33c68fa5222d8627ddaa. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QM6N22287367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a31c0f1a7e1046ca2cd18cb27b1f918fe1ce08ce11f292e5ad8e93aee61ac52. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMBZ92286803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce2b0295837aa3864d6d042db22a24bb731846a93fece4d03d8505720e5c8d7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QMDA62287566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7764dd2bdcc4257b8e4e7cfe457d0c82bb49d20590ade7c2079c072e00513b. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QMFME2209873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc2f2c9f2ee907ed6f55d9dbc7085a9bb506af5f8969bcc04d6f0eb2c85f93e. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QM6MZ2307094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf4add4b44fe0d31acba0062c79880d854e4a0aa84d94245087cfb50a1a5713. 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/QM6N22345045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145d13f056f55dc5e4340accca4f67dc44dcb2a9694b6c3a2c609e9a13495fba. 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/QMBZ92341745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8f5c127795cfb3df03866f2f4ef391d1712aa5bf73836c5a3a4a0f7067f0be. 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/QMBZ92362989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccae035237b4fde6dcac4c9711e97f2f66e5f8880e53340a2a1792ba270652d. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QMFMG2312515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493b9c4b432a1517b981bad2f76d50c3539f342229a32e1c2cff30e530d1fde1. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QMFMG2362325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4abc94974a149caa91c59085fc895d080688e9bf2e8cf045c3e3e4dce99b9f. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QM6P42452273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cae8fac2cb21d1dea5281e478797c321534c32b40406b17f720e7f0a47a1b1. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QM6P42452274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d60d2add18154db3049befd75fb4e135ba0f32867823b5e3aff56a53b6a614. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QM6P42452275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1816743cff01fe9ba03b35a3906b1f4aa0ca433f6f9b633ea1d6ec98f7bc8de0. 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/QM6P42452276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad53be8ed9e864835fe3f6ddad4ad2eda1916252a5d8417285f752628b5a06c3. 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/QM6P42452277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb244ace709e9f6ca3a969d4513dfe0cd6dfdb61374a3ac4d263dd41c9488bf75. 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/QMBZ92404245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd797f9c018b5ca71396efbdf772173f6d578c37265c640b81fab0e445d8c89cf. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMBZ92463195.