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 0x5e85e9aa433baa0ae80090c3413c92c7e3b2be3c99c1b4b695a7a813f71d79ae. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05c5ded4-213a-4b7d-a42b-abe942727e44.json and https://artists.proofprofile.net/proofs/artist/05c5ded4-213a-4b7d-a42b-abe942727e44.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 0x9d5da0277083efe75da565737815f0a2a25fd59d115f93f455c31fc662641e20. 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/7tU4LZnbwmf0mYMboISOzT.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/7tU4LZnbwmf0mYMboISOzT.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56539a7143fcaed687550c862c44e43fbec45a6eff6509d85d72f1b3866c4742. 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/6v2rafTcUtsx09fLOfbH5k.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/6v2rafTcUtsx09fLOfbH5k.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd391d197442c5e705571815054cc31f2ad80b481f94eecf6f701ca749040e874. 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/4DzHtMBXFKn7TQsVs0b3Uh.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/4DzHtMBXFKn7TQsVs0b3Uh.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b521dd0780f219d4cdf8eb93cb42a6034053fe03fe63030478a4953ba42fdf. 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/17rGtgVzgsii9DkkJsx8RG.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/17rGtgVzgsii9DkkJsx8RG.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5da0277083efe75da565737815f0a2a25fd59d115f93f455c31fc662641e20. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4ANU38M9vbljhksagGsb4q.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/4ANU38M9vbljhksagGsb4q.
{"copyright_id":"0xc8058c689eee23ffcd2c5ff7b4c25289fc3e4a4b633231b6a0805eb33adf91a2","isrc":"GX8KD2328317","name":"Quite A Shame","registered_at":"2026-06-04T15:35:36Z","spotify_id":"6yFClefWHhbFQweL76gBAK","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8058c689eee23ffcd2c5ff7b4c25289fc3e4a4b633231b6a0805eb33adf91a2. 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/6yFClefWHhbFQweL76gBAK.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/6yFClefWHhbFQweL76gBAK.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152ba226585dc0bbdd2c66109327abf3e91778787ebda48d28621cb46237589f. 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/2vb2iUVBp3LFLAb3zl2Tmc.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/2vb2iUVBp3LFLAb3zl2Tmc.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f665ecfb8fe3794b4392e532b9a8870661a4653fd3a1aeb71091578512d4881. 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/4ZLhbt8wkiYO61I0JKF71n.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/4ZLhbt8wkiYO61I0JKF71n.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cce2981758df233eb053f53bac481eb23b3a9b931143670cc73baddf1098c7. 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/0guQ1bpGPTRsBhZlqMk9Hq.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/0guQ1bpGPTRsBhZlqMk9Hq.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e4fbdff2ed0ddc04fcd330a4fbee558b0da283b1210eaf09b88e0604fc59f2. 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/313Z0uWKiIdWAZ6MoaIxxh.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/313Z0uWKiIdWAZ6MoaIxxh.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7498a8fb960e95758d211116a73f56ff99e6a217e1ed3ac24b390d74375f37de. 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/6BgiM5dFJviUWwl5YOPPc8.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/6BgiM5dFJviUWwl5YOPPc8.
{"copyright_id":"0xad3dfbc40145cc529c2d996fdf6067411f95cbc12bac5ed501ea5dd92cc92d01","isrc":"QM42K2229950","name":"Coming Home","registered_at":"2026-06-07T21:01:57Z","spotify_id":"5sB3KGBcA8lUTeHKog9Bdl","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3dfbc40145cc529c2d996fdf6067411f95cbc12bac5ed501ea5dd92cc92d01. 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/5sB3KGBcA8lUTeHKog9Bdl.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/5sB3KGBcA8lUTeHKog9Bdl.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3f45b98cac75ab557675b12cb123024e5b7033cd0318163d86670bde0ac304. 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/5KufrtYq3lzKHSBfUutr9j.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/5KufrtYq3lzKHSBfUutr9j.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1746b9245202be576120dc1b4a66fe2915d59a580cc472f871abbf102319f260. 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/3nF9hflbeSBFelkLV9Wf1f.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/3nF9hflbeSBFelkLV9Wf1f.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5da0277083efe75da565737815f0a2a25fd59d115f93f455c31fc662641e20. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6waei3ZrJu4qmSAj2rN7oE.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/6waei3ZrJu4qmSAj2rN7oE.