1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xe5f7979d6fb0aa4ac0355c12e1cf2c51ffa30020020622c8b0f64e595fc5c5a8. 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/8833414f-742a-402f-b1c3-c078032403ff.json and https://artists.proofprofile.net/proofs/artist/8833414f-742a-402f-b1c3-c078032403ff.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x19c418f3af55c57f5b2f2d83a3afc65881663f9d5a6a0b6990230a7920dddcfe","isrc":"CAHQJ2203922","name":"Nothing Without You","registered_at":"2026-06-25T10:28:50Z","spotify_id":"4yBxCtooT7SyUozL2v82yS","type":"track"}
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c418f3af55c57f5b2f2d83a3afc65881663f9d5a6a0b6990230a7920dddcfe. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4yBxCtooT7SyUozL2v82yS.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4yBxCtooT7SyUozL2v82yS.
{"copyright_id":"0xfb6e49cb7859bd84acc21f42faba0b58ce191b6a0170c84dbb01c48145815c74","isrc":"QZK6K2201932","name":"U Make Me Wanna","registered_at":"2026-06-05T13:31:37Z","spotify_id":"3JW32cCSXzYsNcJsGMP3fu","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6e49cb7859bd84acc21f42faba0b58ce191b6a0170c84dbb01c48145815c74. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3JW32cCSXzYsNcJsGMP3fu.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3JW32cCSXzYsNcJsGMP3fu.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0b3e294dc4b7feaf39878643b6ef557e78610227381df0eb76afb7a9e01989. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7fGmBk5qbb5BXGPKCMZcZE.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7fGmBk5qbb5BXGPKCMZcZE.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8830f1b06e2723548bd6c347bacf0b89bc8c30cdec5b74af65fad3e3200bb7b7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3qz7yN7gff4ehIkAOet7wB.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3qz7yN7gff4ehIkAOet7wB.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bebc7c62ddeb7a89cc89c9595207b518c46bf2025f81a6ef34fa0d3d39c455. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1oPGg4bfVVbDWweIn33hmh.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1oPGg4bfVVbDWweIn33hmh.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9832ee041de8f62c71e4782ec811784af0d2a34ac1637a500bd87fb7a7455999. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6wlYXspDlXDK1A8w1KVjr4.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6wlYXspDlXDK1A8w1KVjr4.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c62d11fe8845346b823ea23a9a974346c16583567fe57ae9759ca76e7ea704d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6p6GN8P1toktORHKDdUkIx.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6p6GN8P1toktORHKDdUkIx.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea3ab8a340b9a70723a0373c458c7fd9b25d2b905b1f42566e9b02206f879bd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/46cUqVZE6k4nFZUWt386jc.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/46cUqVZE6k4nFZUWt386jc.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc11a828b16b444f88801538fec9245571f7ab288b5c73a25325d8410e826781. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0hjl4JPLH2evR6LB0MPZ52.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0hjl4JPLH2evR6LB0MPZ52.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc25e761a4b5596088773c7c7f86b8c1f79e240776f7a4b20d361c790dd01232. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1I5GSsY5E5OIFARE8whzat.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1I5GSsY5E5OIFARE8whzat.