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 0xbf6133b1f6b5765263c8e89e2ab1172e7fa30881d878c3de63ec458e976bb27b. 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/d7b41147-9f90-4e6d-8d54-93e9856a9f73.json and https://artists.proofprofile.net/proofs/artist/d7b41147-9f90-4e6d-8d54-93e9856a9f73.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x546d8a32026c5992060d26fc5b36b1a82aac3ae3dadfa40237a462270cfd00a2","isrc":"DEL022170051","name":"Bruises - Flowers on Monday Remix","registered_at":"2026-06-24T07:02:30Z","spotify_id":"0AA2JsRQSr6QWQPMoEQeN2","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 0x546d8a32026c5992060d26fc5b36b1a82aac3ae3dadfa40237a462270cfd00a2. 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/0AA2JsRQSr6QWQPMoEQeN2.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/0AA2JsRQSr6QWQPMoEQeN2.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c28acf274be9828a7907d31449e87784648e5d4ce2eaaa6454c4640a87afb8. 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/58up6yfV93UQeLdPbjFBWe.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/58up6yfV93UQeLdPbjFBWe.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c28acf274be9828a7907d31449e87784648e5d4ce2eaaa6454c4640a87afb8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3nCpr9HsrDXX3MrOdvHcmi.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/3nCpr9HsrDXX3MrOdvHcmi.
{"copyright_id":"0xefd328be5bc4a1048b774eac0a0db4db65d9a3ddb4d4e93adf10bdc914735eb7","isrc":"UK2BS1900027","name":"Evaporate (feat. PaulWetz) - Edit","registered_at":"2026-06-04T10:51:20Z","spotify_id":"6ZaR7Fb1N0bI40eqT0Do0W","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd328be5bc4a1048b774eac0a0db4db65d9a3ddb4d4e93adf10bdc914735eb7. 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/6ZaR7Fb1N0bI40eqT0Do0W.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/6ZaR7Fb1N0bI40eqT0Do0W.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56950cbbeebced9e4eb6acb6545370bcd6aa6905813ea6cba0ccf6200f07ed95. 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/75HBVc7kJLjC2LlPc4ScfH.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/75HBVc7kJLjC2LlPc4ScfH.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105d09df1195403db6010bd235da52e94caa02817334573926f9a7d2732b9c9d. 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/24JzGPeM2Cx1Tt3OXaOPH4.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/24JzGPeM2Cx1Tt3OXaOPH4.