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 0xc57dfd69530ea1cc2ca0637b80fab21fd884b51ede8023e96969ab002d31908d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5597a21-a26e-4bf4-aac4-2b3d211ce80d.json and https://artists.proofprofile.net/proofs/artist/a5597a21-a26e-4bf4-aac4-2b3d211ce80d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x0a3c148aa2720a5e64c57d4678e2ea5db2d1a6de4e61e5a7d72066a95b09daea. 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/0ooAws7fHLglofYxinGWjF.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/0ooAws7fHLglofYxinGWjF.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685aeb2c15e6852f6cc67c091ab30422a0874458d4b561a6f6e1e5a786a94ab5. 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/0ySyUeNwVt9CF8OWh3CLca.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/0ySyUeNwVt9CF8OWh3CLca.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8e084794bab668da6fd3c645f4691807d5204e896dddb5f9e1232640427386. 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/5kPMc3mwmfyzCm5tazd56f.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/5kPMc3mwmfyzCm5tazd56f.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94c6f485fa0d9e263516e5afa9c679965495c91511764128e27bc7b9d169b07. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0zcgLa0m0mI3713e1rJlOs.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/0zcgLa0m0mI3713e1rJlOs.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfaef5431c739bc5589178bb01465d038e8b8c52dbd5507810017f1de92adaee. 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/10lsjcJ1c3kMhSSIJVIT4D.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/10lsjcJ1c3kMhSSIJVIT4D.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe408bd826bbd7cfc9ece09af09f12f4c8d013430154758dbc17d0ab730705e. 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/5zhd4S29GTJ6z50Dp7MlO7.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/5zhd4S29GTJ6z50Dp7MlO7.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9756a491109c80c3ce0fcfdb36a0d8c94671d271fbf8a9f31cb2ad46d113021. 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/5dQo6pFMqRYKcTF0FKGfr8.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/5dQo6pFMqRYKcTF0FKGfr8.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe1f77c6fc5dee280e141162ff739f8b58c4d631b094db851ba1bba4840ff0d. 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/69ZOucb8cSkwtsVf7y1C7n.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/69ZOucb8cSkwtsVf7y1C7n.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d65420e11e9c48d1cc6676899c2f60cb0772c6efd934112bd399c15daca3467. 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/6aFY3PmuJL8vLbOkgz4rUg.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/6aFY3PmuJL8vLbOkgz4rUg.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84c4e5674d42d80529ccd1b3458475075c425aa2158c6ef7be7c72cb7848e3f. 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/53PPuHIBPI5WGAOIhbF8z6.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/53PPuHIBPI5WGAOIhbF8z6.
{"copyright_id":"0x42401584bdffbcfa405c2c74dff7ce290b0ef93aff78d6fe9ce1f536f5c77ab6","isrc":"QZMEP2224740","name":"Ve Svym Stavu","registered_at":"2026-06-05T18:01:37Z","spotify_id":"3riXW6GSnTl3nLLqN5KXON","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42401584bdffbcfa405c2c74dff7ce290b0ef93aff78d6fe9ce1f536f5c77ab6. 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/3riXW6GSnTl3nLLqN5KXON.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/3riXW6GSnTl3nLLqN5KXON.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3757dee43f2662e702a3c2b1fb065e34042fdb18b05a824264d0ec44b148a6. 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/16jeyBlxYLc5A8YAklMtEw.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/16jeyBlxYLc5A8YAklMtEw.
{"copyright_id":"0x3637afe1a449f2945fa5f68a3909442ffca753f9d0da28eece276acfb09d3d99","isrc":"QZMEP2224742","name":"V. Patro","registered_at":"2026-06-04T16:46:34Z","spotify_id":"7b7JCIq6Uiw6TEAoorkCtK","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3637afe1a449f2945fa5f68a3909442ffca753f9d0da28eece276acfb09d3d99. 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/7b7JCIq6Uiw6TEAoorkCtK.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/7b7JCIq6Uiw6TEAoorkCtK.
{"copyright_id":"0x039f45d48cbd8beec75aa31f3b97e1b52f898af15e8d7a8d41ea4da8d25e1b41","isrc":"FR59R1911021","name":"Seznamte se, krusty","registered_at":"2026-06-08T22:09:40Z","spotify_id":"1GM5ozFegLEIpTlkAIKN3z","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039f45d48cbd8beec75aa31f3b97e1b52f898af15e8d7a8d41ea4da8d25e1b41. 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/1GM5ozFegLEIpTlkAIKN3z.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/1GM5ozFegLEIpTlkAIKN3z.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c95e6fba187e420b4d98096f8889d76e1c3e39a3e347070d21df8f67c9bafda. 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/1JteHyfyVQ2otkRUQFWzzt.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/1JteHyfyVQ2otkRUQFWzzt.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72283f8234b4001f108b03c687b3a2ac759d99ca0dc298086931acb2db0b60f. 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/0djD7LJbQoCXjpfBDjbkdW.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/0djD7LJbQoCXjpfBDjbkdW.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932327d650fa31c20cefcf9f6bf1f11386018649c5a3bedd9f2f7b0464f19683. 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/76dgBsvRKEeFoRMvnUjvsd.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/76dgBsvRKEeFoRMvnUjvsd.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24809a2c2b2ef04945cde8da137dd814ee9bb4c12299e693551ce738df64c2b8. 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/4tExrWuwF1PAHfT4PPdS81.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/4tExrWuwF1PAHfT4PPdS81.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f877b6054c8157778e03ee103c452577910e99afd7034dd37af1326200180a9. 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/7gf2fYgwr8kdZvj7fRRuCh.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/7gf2fYgwr8kdZvj7fRRuCh.