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 0x4a9fdc24ccf312574d18bcb95849e9171b48db8e43d295c4a873239da46c21de. 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/583fb679-b2fd-4921-8316-c8179fbf490b.json and https://artists.proofprofile.net/proofs/artist/583fb679-b2fd-4921-8316-c8179fbf490b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x636ba8bb2d79ad995f54657e8e2df2fea427ee26bce48ff28af7fbbd5739b02b","isrc":"QZWDD2287336","name":"BARRAS & BARRAS","registered_at":"2026-06-04T06:56:31Z","spotify_id":"0EZGsX2nm3vSVPQasE1r8N","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 0x636ba8bb2d79ad995f54657e8e2df2fea427ee26bce48ff28af7fbbd5739b02b. 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/0EZGsX2nm3vSVPQasE1r8N.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/0EZGsX2nm3vSVPQasE1r8N.
{"copyright_id":"0x7b20c7de0b411206b6b4084638d50dc12847e808b1cec27f87a6306a0574f2d9","isrc":"QZWDD2287255","name":"TRAP THE FATO NÓIS FEZ EM 5","registered_at":"2026-06-04T15:00:45Z","spotify_id":"3caB4QzPmZnPxqCqyV4Xrt","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b20c7de0b411206b6b4084638d50dc12847e808b1cec27f87a6306a0574f2d9. 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/3caB4QzPmZnPxqCqyV4Xrt.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/3caB4QzPmZnPxqCqyV4Xrt.
{"copyright_id":"0x4492294658c4c5fa97528ee322bdde9c1ea65c840c2226bfe6c8d9ceb4ad5f82","isrc":"QZWDD2287265","name":"DE JET NO PORSHE","registered_at":"2026-06-05T11:20:51Z","spotify_id":"324wgKqxmlBvkoZbooIo6N","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4492294658c4c5fa97528ee322bdde9c1ea65c840c2226bfe6c8d9ceb4ad5f82. 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/324wgKqxmlBvkoZbooIo6N.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/324wgKqxmlBvkoZbooIo6N.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2055cacb56198dd530e79441f7e165ff4de4037b913abe5387b98558ff206cd6. 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/5ESsY63YtVTjACiqzaMK7H.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/5ESsY63YtVTjACiqzaMK7H.
{"copyright_id":"0x153795b140c6bb0a5f3dfa01756261402a18c5958b823e0fd2dd621afdb32fa9","isrc":"QZNJZ2317315","name":"PRODUTO CARO","registered_at":"2026-06-08T03:04:36Z","spotify_id":"5oidbmbRWgd9DtvBwuZd3Z","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153795b140c6bb0a5f3dfa01756261402a18c5958b823e0fd2dd621afdb32fa9. 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/5oidbmbRWgd9DtvBwuZd3Z.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/5oidbmbRWgd9DtvBwuZd3Z.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603d1d82d704ee614269df815cc6f5abe2773953a1be17866b80c18ec249f721. 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/507tluWzOtxx58Kb13L9qu.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/507tluWzOtxx58Kb13L9qu.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8685845c1efe9353dd6c2ed1668a4b549c10262b637f97c62d5fd448fe713d41. 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/72vZU9ppJtsOQ0K7CxhYpN.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/72vZU9ppJtsOQ0K7CxhYpN.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35581bf7ef8df949584a57d261cee1f2f29c8869f90e068492cddf205fa6df5b. 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/4T6pJuSJNulHkTc792CGsM.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/4T6pJuSJNulHkTc792CGsM.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede69f6fb04e32456437e1b9996f89cec4500604a816eb04db420f1b8b5c9596. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T20:31:18Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6On74aITlCX0gwMkWlKMVh.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/6On74aITlCX0gwMkWlKMVh.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da445c12c376d34d068e740901a3e97a781506d3b2c997520686ecd33a1ab86. 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/7MRWZMH8GoIon8nYoww2cY.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/7MRWZMH8GoIon8nYoww2cY.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b0051228a0995389a81200b92bca5063d7fe036e9c4ac22b2c6ed90bbcf73e. 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/31aAjF70nFIt9RkjVa5sX9.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/31aAjF70nFIt9RkjVa5sX9.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b83e1912a5021108bbcc0e55c452d1a2be2ec53dc629b9117a316adfa461f1. 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/0x06HxrYMORavjLJ3dqwNv.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/0x06HxrYMORavjLJ3dqwNv.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4dbae5fd64e1f1911497bea33728c779f93319ceef983ffc5ddb27ddaa3d9da. 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/03dEq4e1OHFZ0NshTdVQnm.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/03dEq4e1OHFZ0NshTdVQnm.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce0dc5e61699ba888306e6d03e88f752cc5b8333d1c7d4e86310870c48ae984. 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/4TmTuQxZNrH0QsnvGuURKl.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/4TmTuQxZNrH0QsnvGuURKl.
{"copyright_id":"0xc33cabc019dcfcd5bb87e368ac81f3959db50d516e95ac567ea74c2ae64a697e","isrc":"QZZ8A2341953","name":"SETE DA NOITE","registered_at":"2026-06-05T21:28:13Z","spotify_id":"770pWASqnOV2fERqgSaaps","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33cabc019dcfcd5bb87e368ac81f3959db50d516e95ac567ea74c2ae64a697e. 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/770pWASqnOV2fERqgSaaps.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/770pWASqnOV2fERqgSaaps.
{"copyright_id":"0x57e102ee7aeda06d15ba14e9b57bc159120d80228e5e1e833500b8bbe451fd54","isrc":"QZZ8A2341958","name":"EU TIVE UM SONHO","registered_at":"2026-06-05T21:29:11Z","spotify_id":"2A8IohKp00elZbPZfVifbo","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e102ee7aeda06d15ba14e9b57bc159120d80228e5e1e833500b8bbe451fd54. 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/2A8IohKp00elZbPZfVifbo.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/2A8IohKp00elZbPZfVifbo.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9922d9f3842ca6463e7be694a80c4d9a878a912643b8ed67e804d38af0e54d9. 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/0ld8djXNujZMjztOdPFcZv.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/0ld8djXNujZMjztOdPFcZv.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6651b41d78ea9b580ab66393727f0d83e6a2abd0898741f7307941d2c1cd83. 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/5285eizFmNC7PGgqKIY5ED.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/5285eizFmNC7PGgqKIY5ED.