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 0x17b081a385d0350012f9481d7264c6588519fcdaa254292a4e5dd45cbe134abf. 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/4732f18f-ecd4-4877-9994-bb867fd6f3b9.json and https://artists.proofprofile.net/proofs/artist/4732f18f-ecd4-4877-9994-bb867fd6f3b9.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 0x6b83365790e746eadd8ef1aecea41314072821e21f0cd33f6461eb576f60e31a. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T20:31:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3p6ZG8vgeJypRMoEvIMdPQ.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/3p6ZG8vgeJypRMoEvIMdPQ.
{"copyright_id":"0x9b11c79c22633745cc0dbfaa0bd795e6c83d54adbde20d1c276274b67e662f4f","isrc":"BXOMB2300001","name":"Difícil De Esquecer","registered_at":"2026-06-10T03:58:14Z","spotify_id":"59gPzC6zAatOA6Rdjnve5q","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b11c79c22633745cc0dbfaa0bd795e6c83d54adbde20d1c276274b67e662f4f. 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/59gPzC6zAatOA6Rdjnve5q.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/59gPzC6zAatOA6Rdjnve5q.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f404e41522980f7698c341ef0313215058ada9699360d4085a50755d9c7ea06. 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/3EDVjg9nrpDhFSPMlroTPc.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/3EDVjg9nrpDhFSPMlroTPc.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34dc4744ff0776c2a9c0c296bdd542e58ff1c99e50e4b8141c4a57e4ef1e67d5. 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/1KXKsGThKt8wbkETdaZfY4.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/1KXKsGThKt8wbkETdaZfY4.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069016cb4fccc01ad501f11748878fbe22b8787f979fdf91f05b8b5d2f6f87c4. 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/6h04QU4Agz9tclUs1TDgbR.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/6h04QU4Agz9tclUs1TDgbR.
{"copyright_id":"0x80e0ab660669d94d9fbd887ca281e249d494ff5564a06deab19c3d852312d1f5","isrc":"BCQAB2300036","name":"Toca o Trompete (Remix)","registered_at":"2026-06-06T09:22:16Z","spotify_id":"1HwR5yetDNU6zVdU5xzpxB","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e0ab660669d94d9fbd887ca281e249d494ff5564a06deab19c3d852312d1f5. 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/1HwR5yetDNU6zVdU5xzpxB.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/1HwR5yetDNU6zVdU5xzpxB.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5df513d8f07005549a4e8cb2bd6c303455647299819962766c231395d0c9cf. 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/0Zcc7iGllcPCyqSle1Dxaf.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/0Zcc7iGllcPCyqSle1Dxaf.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9285fd337b02aa17f21bec7090f3cc15562deba9142c7724c1a5861fad6596. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1mXFFZKbgx1LGIoUqDe3ho.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/1mXFFZKbgx1LGIoUqDe3ho.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5767d1ef89ae5a4593a167c55337ac4d4630b5dad128fc551d2375167952757. 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/716PQM0u5KAK2ZewFFvWNX.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/716PQM0u5KAK2ZewFFvWNX.
{"copyright_id":"0x71f4bd52d1ca0727239df6c1c7156de443991959eb75e643f6885bdc472b9343","isrc":"BCO3K2300162","name":"Olha o Barulhinho da Kenner","registered_at":"2026-06-24T09:01:22Z","spotify_id":"3U0OuktZQC9WSeu3vN8yHE","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f4bd52d1ca0727239df6c1c7156de443991959eb75e643f6885bdc472b9343. 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/3U0OuktZQC9WSeu3vN8yHE.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/3U0OuktZQC9WSeu3vN8yHE.
{"copyright_id":"0x1588d1e6c91c212f253f752f5190e47dc55ac8ebac5f9258dcee18dd83543f22","isrc":"BCO3K2300012","name":"Toma Toma (Dança da Mãozinha)","registered_at":"2026-06-09T06:16:36Z","spotify_id":"6rYpLinEDic5Iq6csMnjOX","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1588d1e6c91c212f253f752f5190e47dc55ac8ebac5f9258dcee18dd83543f22. 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/6rYpLinEDic5Iq6csMnjOX.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/6rYpLinEDic5Iq6csMnjOX.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3847b4779df273254eb261de2a30eec8a093bbcd5daebfc80ab7011cda9a93f0. 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/5dDwJHXmol2lFIbXbPgplj.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/5dDwJHXmol2lFIbXbPgplj.
{"copyright_id":"0x1f4d2f1d8877d62e858cd3daaa35212a07c0c5cb53a4b780d9baa9adb3a9f3f3","isrc":"BRUM72102225","name":"Nem Com Chip","registered_at":"2026-06-24T06:13:52Z","spotify_id":"0WhigzZcjyT0Aewq65IPEQ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4d2f1d8877d62e858cd3daaa35212a07c0c5cb53a4b780d9baa9adb3a9f3f3. 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/0WhigzZcjyT0Aewq65IPEQ.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/0WhigzZcjyT0Aewq65IPEQ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f15408edd4941a3a469604bb86d3a724e1453e0c0025cf80b402db8e9d4f3fc. 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/0Rm3OhJUvE47XEmsrJjoiw.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/0Rm3OhJUvE47XEmsrJjoiw.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfef60de31269a5cdf551bd2289572dfec5cfb53ba53ac295da1ac058a15be3. 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/08eTiYPPqFp7VvsN87taLJ.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/08eTiYPPqFp7VvsN87taLJ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9109f03d57665a250127ab36ae6b9e8a262443ea2f5b786cb848788c59a7cd2. 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/3uNG98gUQs2Ac1yEG7aIKj.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/3uNG98gUQs2Ac1yEG7aIKj.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22334dee76468e3edbc13454e5ebf1f5cd2c5c779b6afbcfea805a3f8b9333e. 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/5bfimwK5FYHMlaa93448w5.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/5bfimwK5FYHMlaa93448w5.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36804d377374c0fd53399be3786e5f8a9230e33876b1380cd643915ff69e86b6. 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/5snBw3nQNKJGJigFceEuwq.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/5snBw3nQNKJGJigFceEuwq.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14773181e018dbc576f490da57bfeb89bea72b8b6664128f18ef2774d9c4e91b. 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/44FdJ59oTi96lzA4tSpEPy.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/44FdJ59oTi96lzA4tSpEPy.
{"copyright_id":"0xe15cefb450f7900638887643f2af6a27070f8b0684e4664f181df63c0ff65ea2","isrc":"QZGLS1906641","name":"Pitbullzado Loratcho Bradock","registered_at":"2026-06-05T07:15:52Z","spotify_id":"7JIR5Q5e4xZYJiawteEJmN","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15cefb450f7900638887643f2af6a27070f8b0684e4664f181df63c0ff65ea2. 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/7JIR5Q5e4xZYJiawteEJmN.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/7JIR5Q5e4xZYJiawteEJmN.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a4d2ad4f6a3dda67e02c9e9494cd867a0712e66477db02a08196611393ce96. 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/7yKoBs5o4XmNzkP2rPcxaR.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/7yKoBs5o4XmNzkP2rPcxaR.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed511eef2ac1e767561b5f8a1c916422cc92b8fa4b5981f33e8c07048f70c73. 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/0JV44FNcTm42b4j5ao5daH.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/0JV44FNcTm42b4j5ao5daH.
{"copyright_id":"0x65cec2e24eecea159d4da3cc81fe0997c2f508fbe75c846fcb1b3c04e98b445a","isrc":"BKDYW2400001","name":"Faya Baby - Remix","registered_at":"2026-06-25T02:24:12Z","spotify_id":"0LN3Kycr4YxoGcLmvSR2Pc","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cec2e24eecea159d4da3cc81fe0997c2f508fbe75c846fcb1b3c04e98b445a. 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/0LN3Kycr4YxoGcLmvSR2Pc.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/0LN3Kycr4YxoGcLmvSR2Pc.
{"copyright_id":"0x71f4bd52d1ca0727239df6c1c7156de443991959eb75e643f6885bdc472b9343","isrc":"BCO3K2300162","name":"Olha o Barulhinho da Kenner","registered_at":"2026-06-24T09:01:22Z","spotify_id":"7tWrxB68qqWV28AsEutTuU","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f4bd52d1ca0727239df6c1c7156de443991959eb75e643f6885bdc472b9343. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7tWrxB68qqWV28AsEutTuU.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/7tWrxB68qqWV28AsEutTuU.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012bdf638b8ae83ac624f75adf80f9875790d06910ed4f6ceae94e3430f5bb14. 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/3921fyoMGTpS3IaJ92xRpy.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/3921fyoMGTpS3IaJ92xRpy.
{"copyright_id":"0x3f33932b4c0ca71d35502b81a6b585077338dce5b98b8fe39acdc5b6176deb59","isrc":"BKPN32500142","name":"Solta o Arrascaeta","registered_at":"2026-06-28T06:13:24Z","spotify_id":"1FsGLROSJBsQLG5AldBlwV","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f33932b4c0ca71d35502b81a6b585077338dce5b98b8fe39acdc5b6176deb59. 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/1FsGLROSJBsQLG5AldBlwV.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/1FsGLROSJBsQLG5AldBlwV.