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 0x7b1e31591aadbcda19881fbca9e94385bb4578b9727aa5d561eebf941e0b2614. 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/55585d8b-dfb5-4385-971e-3d20a6380cff.json and https://artists.proofprofile.net/proofs/artist/55585d8b-dfb5-4385-971e-3d20a6380cff.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x9b5c822933b03310057dbb7463eb3e161d998598c1c69a3562a0f4d32306f2ad","isrc":"QM24S2403379","name":"jacob killed a cat (Reimagined)","registered_at":"2026-06-09T16:51:00Z","spotify_id":"1gtk2PLznPcWS4HnMntaVy","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 0x9b5c822933b03310057dbb7463eb3e161d998598c1c69a3562a0f4d32306f2ad. 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/1gtk2PLznPcWS4HnMntaVy.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/1gtk2PLznPcWS4HnMntaVy.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8174c6741245df33497685eec6ee9613b8710025eb215d2c1535c24c27624518. 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/27KjS3obnsAiUMAioAuhsQ.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/27KjS3obnsAiUMAioAuhsQ.
{"copyright_id":"0x347a862c88af010f1e9148f35f00ca5fdc42509384a15b143a79cdbd8d1ff639","isrc":"QM24S2403377","name":"tattletale (Reimagined)","registered_at":"2026-06-05T20:09:09Z","spotify_id":"1UMNKKJ7xRTIkwbW0SWNjA","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347a862c88af010f1e9148f35f00ca5fdc42509384a15b143a79cdbd8d1ff639. 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/1UMNKKJ7xRTIkwbW0SWNjA.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/1UMNKKJ7xRTIkwbW0SWNjA.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0b7c96a93c92236b6d15496d90767b3ae7801276c3990724c5fa783e8cc6cf. 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/7q53qwEvBesvo0GlrbFRQK.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/7q53qwEvBesvo0GlrbFRQK.
{"copyright_id":"0x40adad0de07a5f71a5d8ddf31615b8a5d4f52ec3941a1466e6e8dcd6820d4fe6","isrc":"QM24S2403375","name":"star tripping (Reimagined)","registered_at":"2026-06-06T23:37:06Z","spotify_id":"3T4qx5muodvi9apeRIzamI","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40adad0de07a5f71a5d8ddf31615b8a5d4f52ec3941a1466e6e8dcd6820d4fe6. 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/3T4qx5muodvi9apeRIzamI.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/3T4qx5muodvi9apeRIzamI.
{"copyright_id":"0xb9943de5ffc2c24a713f05de4657453d4e08dbcfb5155e1a2e21157b22fffeca","isrc":"QM24S2403374","name":"christopher street (Reimagined)","registered_at":"2026-06-08T19:37:46Z","spotify_id":"3JY3Io8m4daLiKcaAwnuBb","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9943de5ffc2c24a713f05de4657453d4e08dbcfb5155e1a2e21157b22fffeca. 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/3JY3Io8m4daLiKcaAwnuBb.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/3JY3Io8m4daLiKcaAwnuBb.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb1967dccf8563227781c8d87c3df408bf4b887b562bb13377ace31bebd0944. 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/3IEKnjIkbiNVnQEXstiqhh.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/3IEKnjIkbiNVnQEXstiqhh.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c20098302567d5abd774302da99279d5470f3de3d72f884b04c6ec3d56ae4b. 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/7BV3g2cYzPAI1xLuqy7Lrr.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/7BV3g2cYzPAI1xLuqy7Lrr.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68145333805bc639be696aba1b0b7d5e0328854f89346738795cbe3be76d4865. 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/3PRdxas6KL30m6PzH1NYV0.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/3PRdxas6KL30m6PzH1NYV0.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c20098302567d5abd774302da99279d5470f3de3d72f884b04c6ec3d56ae4b. 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/0u7184d6EPWJxkezc4eUI0.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/0u7184d6EPWJxkezc4eUI0.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68145333805bc639be696aba1b0b7d5e0328854f89346738795cbe3be76d4865. 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/6fv6o9KzIIBzcIpmhRhqVO.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/6fv6o9KzIIBzcIpmhRhqVO.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68145333805bc639be696aba1b0b7d5e0328854f89346738795cbe3be76d4865. 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/2xtF0pR5YIroM6MzKUhJBy.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/2xtF0pR5YIroM6MzKUhJBy.
{"copyright_id":"0xdf2f403a499849e85b67fd7e20ae5c105e1e6ae4ec974afdd8afcdd331d33a73","isrc":"QM24S2306508","name":"why did you invite me to your wedding","registered_at":"2026-06-04T07:35:03Z","spotify_id":"4AKSoFYpOKR2uV1MrBDGoZ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2f403a499849e85b67fd7e20ae5c105e1e6ae4ec974afdd8afcdd331d33a73. 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/4AKSoFYpOKR2uV1MrBDGoZ.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/4AKSoFYpOKR2uV1MrBDGoZ.
{"copyright_id":"0xb8a21076b12c0772055dbac08ed5af8285210fc71b0fc075edd7dfee62b926ad","isrc":"QM24S2205165","name":"star tripping","registered_at":"2026-06-04T14:44:27Z","spotify_id":"1ozWhltP7jnU01qOMWYBXH","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a21076b12c0772055dbac08ed5af8285210fc71b0fc075edd7dfee62b926ad. 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/1ozWhltP7jnU01qOMWYBXH.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/1ozWhltP7jnU01qOMWYBXH.
{"copyright_id":"0x4d9f85d643e17a716e8747f8c4dbd6cc45bfe98ef3bde75565f859741051f990","isrc":"QZHN82224733","name":"my blood is your blood","registered_at":"2026-06-05T16:29:38Z","spotify_id":"32CFALLwNdaaQ2b2ULJWXg","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9f85d643e17a716e8747f8c4dbd6cc45bfe98ef3bde75565f859741051f990. 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/32CFALLwNdaaQ2b2ULJWXg.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/32CFALLwNdaaQ2b2ULJWXg.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1ce6b38ffefe86ff90eaf767f230d3e76173caf00d55e5300235abd7536a1b. 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/23WHimne7W57zHaZokq2CR.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/23WHimne7W57zHaZokq2CR.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1569bc777cf8609220c994ced2afb6aea7e87d96fd86aa68e7e1916b10654bbb. 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/6RIvdAJWpr4gAO9yJ11pYX.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/6RIvdAJWpr4gAO9yJ11pYX.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22539491504f76820f0e87c88209acbce0b866fefb39ac463ff878cb28f8f65. 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/2GEcGEs9xsgYNrT4cbmzOe.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/2GEcGEs9xsgYNrT4cbmzOe.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0e45069ea12765ac264392c718d636ab009895cc6e599e3210f3142535c285. 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/37rdFTdQOWHTUNh56ST40g.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/37rdFTdQOWHTUNh56ST40g.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb13a7bebeca14111c52d53419d6d9956ddbdd9c1d66be081a3012f14478bcf7. 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/1KdZiy0WiQr47Z5n06JGFx.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/1KdZiy0WiQr47Z5n06JGFx.
{"copyright_id":"0xe35d7a9e177bcd59cb07c4527c410a8384ffd72394f359acd55eacd07bd10e0e","isrc":"QZTAS2145565","name":"a song about murder","registered_at":"2026-06-07T13:04:50Z","spotify_id":"3oetivDGpADYbnlSdUvTZY","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35d7a9e177bcd59cb07c4527c410a8384ffd72394f359acd55eacd07bd10e0e. 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/3oetivDGpADYbnlSdUvTZY.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/3oetivDGpADYbnlSdUvTZY.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae75a526da9ad73a499e9dfedfa5352337aede132fa1b42cda28e888c7da97d. 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/6w5KKFh6vWtQBQf3PefsDA.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/6w5KKFh6vWtQBQf3PefsDA.