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 0x6afd1e2e96b0d38e77d9e020228026b1a3487ce215d36821f12e0353370b9d09. 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/c9c6d58f-6da1-46d6-8fe4-e4aa7d6b7ec2.json and https://artists.proofprofile.net/proofs/artist/c9c6d58f-6da1-46d6-8fe4-e4aa7d6b7ec2.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 0x4a1226d84ec18370392b764feac4aa7a8f4413fb435f19baab8d719c0bba5bc5. 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/7aVB74lEFqDxIsVQN9nnw7.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/7aVB74lEFqDxIsVQN9nnw7.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3d9a69831913d58323ba034830c8822a4ed00e1f0e11c3f22c1b580b51df09. 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/6EaXsDCrHdystUzUld8LAs.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/6EaXsDCrHdystUzUld8LAs.
{"copyright_id":"0x1e2eff3ac2f6a8dc47e91e0cc71eae3b1857e287d837ecb614e64fd6a015c139","isrc":"QZ5FN2226184","name":"Deed Poll","registered_at":"2026-06-09T20:07:28Z","spotify_id":"63dRS1KnmiZcfaVuR6daUE","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2eff3ac2f6a8dc47e91e0cc71eae3b1857e287d837ecb614e64fd6a015c139. 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/63dRS1KnmiZcfaVuR6daUE.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/63dRS1KnmiZcfaVuR6daUE.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc0355a1e995ba1696f73185d9a977cd6a6ceb57a39fbb19223031aac70a42e. 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/1FDLX9qNtxI1KRzcKJWTWt.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/1FDLX9qNtxI1KRzcKJWTWt.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2eff3ac2f6a8dc47e91e0cc71eae3b1857e287d837ecb614e64fd6a015c139. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6mz41ioVX34Y4iiDYj93sD.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/6mz41ioVX34Y4iiDYj93sD.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d434556c95bf62a264d0c79d15de4a291a49ec30da113894cbeb977f08713e6. 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/1mNAzWP8Q6Cs9WhTdekiF7.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/1mNAzWP8Q6Cs9WhTdekiF7.
{"copyright_id":"0xe054956ecccd935b1666519501506576aece63395425ab8fab7d15dd46b98aed","isrc":"USLZJ2212126","name":"Greatest Ting","registered_at":"2026-06-09T21:05:29Z","spotify_id":"0caRSLxxStH8uPMvzVSb3q","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe054956ecccd935b1666519501506576aece63395425ab8fab7d15dd46b98aed. 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/0caRSLxxStH8uPMvzVSb3q.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/0caRSLxxStH8uPMvzVSb3q.