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 0xcde447ddbb7aebde1f2a3eb11e4d77c5853dcad2d4fb6943d1352871d7b1c8b6. 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/b818abed-ede7-4749-a5d6-ed73a1cc296f.json and https://artists.proofprofile.net/proofs/artist/b818abed-ede7-4749-a5d6-ed73a1cc296f.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 0x489be343508b9074b962cb7d643fd8585bb0793fbc4fe70e9fb560290990aae7. 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/TCACQ1631457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4e78b16182b68b0e8f4ed49915e55ddc3f5765d4e7acc360c819316f8bd0b3. 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/TCACZ1775338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32e6f49121f80adb67a90176e1f4beb1edb5634df91cbbab35421d29c35878e. 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/TCACZ1775352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e51c1b72c5c862df36761ddbcec0243d2cc48aa06dcef377c20ae129bec5a7c. 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/TCADK1718038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d748cd028dbc108e5d1707b13f2402e68fbff815cfe1199bb1540feb17aa58. 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/TCADK1718041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b3311be7588c38e1d689fbc48a6b3da45fe05f24fb7650c6ad73f542aff176. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/TCADQ1876291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa9e89be2784fa48e16106959df759a7ad1fd7de9978477e7cfd4c0eb006d87. 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/QZHNA1905892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56e784b9c0f59fb29bd0755dc28e79e8cc06e28415c06c508128ba8cd340221. 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/QZK6Q1998778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d2d43e4973e69fe65a995f0d5ff858570c0da6086c8688b80a17dd07426f30. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZFYZ1972964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1071c5c6a54f37c939346d668c61119496ff110aba7b1f619991c018c421eb5. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:32:14Z), 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/QZEQU2032037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764d1e69abb0256cc3d694ca26d605b09b97d97973cc23f07201b887403f81e4. 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/QZEQU2032043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3810d53421bf5babddac2c9f9bda1799a2afe59fe01725f26fe5d19d0a15b5. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:01:24Z), 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/QZNWW2026740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9444515f99ea295a2574628f80f155b35a5a41e6e1743b0a107c44e3b1440263. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:44:20Z), 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/QZFYX2132134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5225fb0b512fd12e059991f46423df44819c3a6d3548683f4f8e6945af2bef9e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHN52156522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71af729115cb46c3ffc622626e8e89fc3b4063752869d3d531e5ba15e37593bc. 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/QZHN72237482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2fcd582e7fc22d16e84636950179aa1d0eec4e704117288f4b4a73deb0517c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHNB2294104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301a69f60ffb45ecd2e85727db3303abae2400dcf0d8011c60c96b2f740029e2. 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/QZK6N2245758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a9ca3ebd25ee98a0976c8cf84d85d9b807cd65a06c940794085fdcf70e5f46. 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/QZRP42239846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c85604d3dfcda70e213322c4d5ff4d5e857975c219e71d817ef6a946bb30d40. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZFZ72384016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591adab71bcb017aaf2af769a29ce5a5dfa661e665d41d12ba3b673637f976e0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:04:45Z), 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/QZNWW2380634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d841e515139139bf9cf3b422348ce69b823d4dc6669336f7589919abacb8fd. 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/QZWFL2326363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9405df07fbe681df6ff491e89db82c39367d189a2d7d216c9b76e5bfd3ae0e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZDA82482341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35a266e7919dc7a4a60935186c2a033472d065071ce0982611ee66e715e0ff2. 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/QZEQU2401525.