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 0xfd8b1825767416e94e5f0ef652cc1a894cb0a86dbe0ca628d27706ae44229a8c. 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/af7827a7-967c-4b28-9574-f6323344b13c.json and https://artists.proofprofile.net/proofs/artist/af7827a7-967c-4b28-9574-f6323344b13c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Original gangster (avec Ugoboss et Maze)
Cocaïno Rap Musique Vol.1 Cd Mixé De Styles Libres Exclusifs
{"copyright_id":"0xae279fd2cdac936b89682e03fcdcf58c8011ba9a13cf928712844e7d03e4d6b4","isrc":"CAG340500027","name":"Cocaïno Rap Musique","registered_at":"2026-06-29T15:50:13Z","spotify_id":"3UnPd1aXp3LknWfapaTwxF","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 0xae279fd2cdac936b89682e03fcdcf58c8011ba9a13cf928712844e7d03e4d6b4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3UnPd1aXp3LknWfapaTwxF.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/3UnPd1aXp3LknWfapaTwxF.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577b31b98cd48b5b03666f1472c4205801d1a102e44ce8e43eaacbe0a7ecdd3e. 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/3L0ymd8C4a5XtYN9XvABlh.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/3L0ymd8C4a5XtYN9XvABlh.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69282a9ca2ece192d560885904a9251145513680f496a3be21862f58fec5a526. 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/34KG3uXjkvMckvXjpbEzci.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/34KG3uXjkvMckvXjpbEzci.
{"copyright_id":"0xed45efa9d1e6a515e7ccf87cfa4c488f0356284e7c2fc8272ce1536a330c3429","isrc":"FR9NG2100059","name":"John Wick 3 N.R.A","registered_at":"2026-06-05T11:58:14Z","spotify_id":"2fMZKUcXsRP4aSWSCVaRvD","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed45efa9d1e6a515e7ccf87cfa4c488f0356284e7c2fc8272ce1536a330c3429. 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/2fMZKUcXsRP4aSWSCVaRvD.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/2fMZKUcXsRP4aSWSCVaRvD.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed45efa9d1e6a515e7ccf87cfa4c488f0356284e7c2fc8272ce1536a330c3429. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7uWOu9F1IQns3lhmEqMhoy.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/7uWOu9F1IQns3lhmEqMhoy.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef18e9c8f00b8e43c687043b7e2e676ea209586ab6cbe0139aeb5ec18c782537. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3tLO45Yzkd8RxJEHHvRf0i.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/3tLO45Yzkd8RxJEHHvRf0i.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9a1fd283c819542d45ede4751b4423f9b2de10753f12acd6276bb5127ab8c3. 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/0ENodUO40QWimZe2vKFSTU.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/0ENodUO40QWimZe2vKFSTU.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61a62d95a2838cb60f4cf023f4c1ffdd0ed57f267cdb525d1701f0416dc5258. 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/1mDU7FKeS9BnS6jS0jLyXY.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/1mDU7FKeS9BnS6jS0jLyXY.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb4619528357ed42bdd0908435255029cca1da8aa270932b39fef299d9d5864. 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/4YLeKHAaLzX9ZLPXN8BBa5.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/4YLeKHAaLzX9ZLPXN8BBa5.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed45efa9d1e6a515e7ccf87cfa4c488f0356284e7c2fc8272ce1536a330c3429. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/75aWMsPcacTELDkhge9z4B.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/75aWMsPcacTELDkhge9z4B.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a1db8ace954fd907ec02d08fdfda3d3b61e303ab77226660f150c31d42508a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2TvvfsIgz9WpALrKRg44tn.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/2TvvfsIgz9WpALrKRg44tn.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7c7f47ea1398e69d6624a7046896abbc45efe7fcd7f80cc77f73ff9e145893. 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/3DQz3XqbPGFgjupZ685K78.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/3DQz3XqbPGFgjupZ685K78.