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 0x70c85118454483c50884595935eb4942bdbc7d46f44e74255b7043b083fd3550. 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/ea680400-9b9c-4d56-82d5-fda62240e9bd.json and https://artists.proofprofile.net/proofs/artist/ea680400-9b9c-4d56-82d5-fda62240e9bd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x7c6f2ba42876ea06bf01fe0c44301f748a356e8f35701ad90418b7d9b65bf60c","isrc":"GBDMT1400301","name":"Story of My Life","registered_at":"2026-06-19T08:37:01Z","spotify_id":"3ydugSsQNe4kR6vzIcMu0U","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 0x7c6f2ba42876ea06bf01fe0c44301f748a356e8f35701ad90418b7d9b65bf60c. 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/3ydugSsQNe4kR6vzIcMu0U.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/3ydugSsQNe4kR6vzIcMu0U.
{"copyright_id":"0xa8e077f7363644b34af58c3a08b308be404f799ee9f0879f4900a4f17a9ad6da","isrc":"GBDMT1600079","name":"Humble And Kind","registered_at":"2026-06-26T17:45:00Z","spotify_id":"6IwsmjQATWph5XeIceEAWx","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e077f7363644b34af58c3a08b308be404f799ee9f0879f4900a4f17a9ad6da. 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/6IwsmjQATWph5XeIceEAWx.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/6IwsmjQATWph5XeIceEAWx.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d68c535ce24a12c8a2f7ed8e78128762bdb90026e22d54028978bdf055e9cb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4mqNr2frmyhF4gg9sG3wD7.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/4mqNr2frmyhF4gg9sG3wD7.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb02db8eea536abb7f3af84c54559635a6bca9fcbde24e0297babf6a72a1744. 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/6BOkYgTqftZV6eK9NiULf5.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/6BOkYgTqftZV6eK9NiULf5.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb02db8eea536abb7f3af84c54559635a6bca9fcbde24e0297babf6a72a1744. 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/1ZrvRsQEfc3yudlnsznxto.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/1ZrvRsQEfc3yudlnsznxto.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876120b669231e7611d4ac441666b7757d8b7250ed166f3edfca39231af4c8e0. 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/3J8oMWcp5keI5B9NR77qzE.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/3J8oMWcp5keI5B9NR77qzE.
{"copyright_id":"0x3bc7e6aab1c681da3968d09b250fedff3849af631ffd7cc7e6497b9483b2b7a2","isrc":"GBDMT2000480","name":"Jealous (Piano Acoustic)","registered_at":"2026-06-28T00:47:07Z","spotify_id":"4CspZz9aBExw4AIMzDGEjw","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc7e6aab1c681da3968d09b250fedff3849af631ffd7cc7e6497b9483b2b7a2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4CspZz9aBExw4AIMzDGEjw.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/4CspZz9aBExw4AIMzDGEjw.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728493d188ca65a4570c7c4473f418d3c4b9cd84e829fc4007ae44fe044eef51. 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/3tA7wpzQF5eH2AECKgUrw4.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/3tA7wpzQF5eH2AECKgUrw4.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b02aae2843ab825fa50e3b9f605ff3760e890ce65de508829d420d173bf7b03. 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/7tCC6GEAhS5nIrd3ZahW0n.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/7tCC6GEAhS5nIrd3ZahW0n.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda52982f6f1f77cf0ec637952d0e71961b72670d77316ff0c578fa65711c76a. 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/2ZbG8chDrqMOJJjS66nuO5.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/2ZbG8chDrqMOJJjS66nuO5.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a22396122836e5c86c66b2029e8895379f809faeaf6d9c0a87af6228db415ba. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/300VWuofEwSVxh5AOd7gR1.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/300VWuofEwSVxh5AOd7gR1.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278ba5da1cdfb0944b159c910b8227c274446215f4cb2f02066382aa325078cb. 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/4Qg2PKNifKhK0zUfSp5AF3.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/4Qg2PKNifKhK0zUfSp5AF3.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be500191fff5511ec5e3829711acd73cc42ce26028a3d7645f0be942ff2c31b. 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/2OcZ7956nCJ1OJ6oyNDLtf.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/2OcZ7956nCJ1OJ6oyNDLtf.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909bb68d701d257e51a20de55b90888ad54ae9397eef01c4864e16c8033108de. 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/5AcQg57Gg8zrqeIPoHZzPG.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/5AcQg57Gg8zrqeIPoHZzPG.
{"copyright_id":"0x18fb5bd458439c6128fc70ed461e6778ea53084beb8be0c09247710facd57fbb","isrc":"GBDMT1300881","name":"The Other Side (Acoustic Version)","registered_at":"2026-06-22T23:22:34Z","spotify_id":"5NbiP2OSTbGwivKX7cfk7x","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fb5bd458439c6128fc70ed461e6778ea53084beb8be0c09247710facd57fbb. 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/5NbiP2OSTbGwivKX7cfk7x.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/5NbiP2OSTbGwivKX7cfk7x.