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 0x3d7df260a5741fcf759a454963cf8f1e634e1076bc40a5b285052fba9dd54062. 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/209bd9e7-7395-4363-b214-d4bad5aa772a.json and https://artists.proofprofile.net/proofs/artist/209bd9e7-7395-4363-b214-d4bad5aa772a.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 0xa01f4d49c2d45c0458833d9c8e694b295604c55d233805d312bef4f175c63970. 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/2Xo77y5nB3jt3QGXIniO8f.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/2Xo77y5nB3jt3QGXIniO8f.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221c57ed0c4acf1240806235da264859f8b1b96b02f6d7fd5bc9dc016e490632. 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/6VgPmixofRDUQkQawlPR5w.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/6VgPmixofRDUQkQawlPR5w.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb280946d11c49c0c2d21bf0686bea2de96e7a994bd27337d6c5e0769348c0899. 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/4sIYN8Hx6DJqtDSb2QlvDc.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/4sIYN8Hx6DJqtDSb2QlvDc.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ca71921536d0b0f0720b4f448b7aaec8f7b8024883a5b189f9d6e9d165efad. 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/4AsI3CduUJukQ8NowXcOZD.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/4AsI3CduUJukQ8NowXcOZD.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf654e577d968621a0f7ca2456ade8c771fd657b58afaaf5f632c245c296ebe05. 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/1nKrzJTmHco8OS6En7o638.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/1nKrzJTmHco8OS6En7o638.
{"copyright_id":"0xab2f35cf6255342ba55ab475b609e1dd64c46acbe94d6b7585f0f5f83c3cbd57","isrc":"FR59R2158939","name":"Se Eu Cantar","registered_at":"2026-06-06T05:10:31Z","spotify_id":"1scakcRqEVMVmgQzzy96qg","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2f35cf6255342ba55ab475b609e1dd64c46acbe94d6b7585f0f5f83c3cbd57. 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/1scakcRqEVMVmgQzzy96qg.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/1scakcRqEVMVmgQzzy96qg.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffdcbcfed5a5ccba37fe123de5fb5991532bb445806483e57bb82e7e3fc7fb2. 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/03VRyzdjPwcDTFueL1Zpsp.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/03VRyzdjPwcDTFueL1Zpsp.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0682d8052cb0717edafe07bff04097f1ddef699cb8f53f66df2f9389cbc249d. 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/73zBntCmz66H1Q4bE46rV6.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/73zBntCmz66H1Q4bE46rV6.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01664c0a815e17ba2fc06aec8fdd40bd80d3fe8ccb27c339b26c132c3ea97c57. 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/7FDPNBu49kJxVWLEQsNvNj.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/7FDPNBu49kJxVWLEQsNvNj.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffdcbcfed5a5ccba37fe123de5fb5991532bb445806483e57bb82e7e3fc7fb2. 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/4OHarkNggGMQXxge5IRwpt.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/4OHarkNggGMQXxge5IRwpt.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd67cebed05f0ee3689aeb4a388c3d36b5fb9832c43f678044ad98581a7b9be. 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/2c8YVkk894C064X13Xh7oC.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/2c8YVkk894C064X13Xh7oC.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7d029d423a28f24c4b974e1c243a78615d7a6c068c90144e937af15f31fff1. 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/3QHFnokT8ScJSb2RJCpRxz.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/3QHFnokT8ScJSb2RJCpRxz.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0682d8052cb0717edafe07bff04097f1ddef699cb8f53f66df2f9389cbc249d. 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/7u2yjL4rTLOsQm1mBLQB14.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/7u2yjL4rTLOsQm1mBLQB14.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8baa610a88897cb01f5be7c2d663b2a902894fcc22c4a9af3948abbe871b410b. 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/1rLfPwZkhOwu0thk1dapYB.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/1rLfPwZkhOwu0thk1dapYB.