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 0x5c699fb449eb5f7fc242fb67781c2c92961cc3ada0d3f3c63578ef2bf8014c18. 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/051bb69e-ff14-47d2-a97c-dcd7947ff87e.json and https://artists.proofprofile.net/proofs/artist/051bb69e-ff14-47d2-a97c-dcd7947ff87e.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 0x1a8d518969a7a272f0bd60e1df3a43a466fe01389dd60761f3b09abc819e3f00. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/51JsXLyrjwtKn9Hi8A0VN0.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/51JsXLyrjwtKn9Hi8A0VN0.
Jan Douwe Kroeske presents: The Best of 10 Years 2 Meter Sessions
{"copyright_id":"0x41e97f8170b970998f6caef44d6d06bd9c0a15c42c653817ae6a7f98f153ab88","isrc":"NL07C1700792","name":"How Bizarre - 2 Meter Session","registered_at":"2026-06-21T22:32:08Z","spotify_id":"3NPFRqmABCU7pkTFIwhbkH","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e97f8170b970998f6caef44d6d06bd9c0a15c42c653817ae6a7f98f153ab88. 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/3NPFRqmABCU7pkTFIwhbkH.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/3NPFRqmABCU7pkTFIwhbkH.
{"copyright_id":"0x1a8d518969a7a272f0bd60e1df3a43a466fe01389dd60761f3b09abc819e3f00","isrc":"NZPY09500002","name":"How Bizarre","registered_at":"2026-06-08T03:00:52Z","spotify_id":"1YyoIOVcwPbGhHoFRZqerW","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8d518969a7a272f0bd60e1df3a43a466fe01389dd60761f3b09abc819e3f00. 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/1YyoIOVcwPbGhHoFRZqerW.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/1YyoIOVcwPbGhHoFRZqerW.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8d518969a7a272f0bd60e1df3a43a466fe01389dd60761f3b09abc819e3f00. 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/3t7SqfAhcMxGuiiS9ZCIR7.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/3t7SqfAhcMxGuiiS9ZCIR7.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8d518969a7a272f0bd60e1df3a43a466fe01389dd60761f3b09abc819e3f00. 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/73nDaYIDKEkjKUSfw3MewS.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/73nDaYIDKEkjKUSfw3MewS.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8d518969a7a272f0bd60e1df3a43a466fe01389dd60761f3b09abc819e3f00. 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/0BRskScFUlOCh7QTPo9bsY.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/0BRskScFUlOCh7QTPo9bsY.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8d518969a7a272f0bd60e1df3a43a466fe01389dd60761f3b09abc819e3f00. 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/4sMQTduLKlGsTUd1aqE0NU.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/4sMQTduLKlGsTUd1aqE0NU.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8d518969a7a272f0bd60e1df3a43a466fe01389dd60761f3b09abc819e3f00. 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/0uderccOh7OS8QWLEH3FYw.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/0uderccOh7OS8QWLEH3FYw.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8d518969a7a272f0bd60e1df3a43a466fe01389dd60761f3b09abc819e3f00. 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/5PG1WNltkwMhWBMnvpUpP9.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/5PG1WNltkwMhWBMnvpUpP9.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8d518969a7a272f0bd60e1df3a43a466fe01389dd60761f3b09abc819e3f00. 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/50GIqSJsxvYdCjPA8EIU5a.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/50GIqSJsxvYdCjPA8EIU5a.