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 0xb67b00b16be49d59548abadf5ac43657f8195119b1faffbdf711c890e6cf7226. 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/13f076c2-6eb9-430e-9439-5bf9c45abaa8.json and https://artists.proofprofile.net/proofs/artist/13f076c2-6eb9-430e-9439-5bf9c45abaa8.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 0xa805c32fc559f42172fa16239064696d678323de18a2f4a96c2ee647dbdf3029. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6uQhFBCHN2ffTudfr6Zefo.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/6uQhFBCHN2ffTudfr6Zefo.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942e9d12343c4b44b08ddde8d3026f5bad87b40474b57c896ecd34fc05908630. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2SZjB26ZsARtavgZMaPzgN.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/2SZjB26ZsARtavgZMaPzgN.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570a1807f8e84637bb111d0740130fd9f23d419652de05d5603406e3025db07e. 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/5BmpkAjBFFuKku4XE1r4Dv.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/5BmpkAjBFFuKku4XE1r4Dv.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942e9d12343c4b44b08ddde8d3026f5bad87b40474b57c896ecd34fc05908630. 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/0XzYqhXSnXqetQtFbfHPfw.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/0XzYqhXSnXqetQtFbfHPfw.
{"copyright_id":"0xc73ecdc9697daf0a6c80779eee02a3475f9763fedbcd76ad2ed9c94b102be995","isrc":"TCAFF2026431","name":"Brahms' lullaby (The Cradle Song)","registered_at":"2026-06-06T14:35:19Z","spotify_id":"01o0Dgiunyjb6dGIF6ojSz","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73ecdc9697daf0a6c80779eee02a3475f9763fedbcd76ad2ed9c94b102be995. 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/01o0Dgiunyjb6dGIF6ojSz.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/01o0Dgiunyjb6dGIF6ojSz.
{"copyright_id":"0x2bc65846e4463a9a7199ea37e8af4d2cd08760fe8bbb6da3f83b1935189a96d4","isrc":"TCAFF2026468","name":"Twinkle, Twinkle, Little Star","registered_at":"2026-06-23T23:47:37Z","spotify_id":"70rvtbQHuR9v0TvkstnHXQ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc65846e4463a9a7199ea37e8af4d2cd08760fe8bbb6da3f83b1935189a96d4. 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/70rvtbQHuR9v0TvkstnHXQ.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/70rvtbQHuR9v0TvkstnHXQ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa805c32fc559f42172fa16239064696d678323de18a2f4a96c2ee647dbdf3029. 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/3gXNjZnKZCEr8klFL1GT0v.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/3gXNjZnKZCEr8klFL1GT0v.
{"copyright_id":"0x9757d932aacaae48e6b438e01426d81b8cae60afe1ba63b06839d217e84ab83c","isrc":"TCAFF2026465","name":"Jesu, Joy of Man's Desiring","registered_at":"2026-06-25T04:07:49Z","spotify_id":"3wCm9B35Vu3W1GGx08ytCR","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9757d932aacaae48e6b438e01426d81b8cae60afe1ba63b06839d217e84ab83c. 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/3wCm9B35Vu3W1GGx08ytCR.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/3wCm9B35Vu3W1GGx08ytCR.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39836362bf149759a7900cc79bd71381317958f6a457c73e4d0c7d75fa7f753. 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/7lhMz8S1uNs7XW4gJBD1Xh.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/7lhMz8S1uNs7XW4gJBD1Xh.
{"copyright_id":"0x58d8383bd5f6068e61b35b7bab3981252acfc6e9da857f581d1e5a75dd1c3330","isrc":"TCAFF2026455","name":"Pachelbel's Canon in D","registered_at":"2026-06-07T17:06:50Z","spotify_id":"4aoSK8fRO8CPr5sWdJr1f0","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d8383bd5f6068e61b35b7bab3981252acfc6e9da857f581d1e5a75dd1c3330. 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/4aoSK8fRO8CPr5sWdJr1f0.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/4aoSK8fRO8CPr5sWdJr1f0.
{"copyright_id":"0x88e29aa8a2dbb1fd615ea871327318b7aaf35b9f3a2052981ea275b321d3a26e","isrc":"TCAFF2026481","name":"When You Wish Upon a Star","registered_at":"2026-06-26T10:43:41Z","spotify_id":"07SQC8DGLPaSjNzXUqLZ4d","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e29aa8a2dbb1fd615ea871327318b7aaf35b9f3a2052981ea275b321d3a26e. 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/07SQC8DGLPaSjNzXUqLZ4d.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/07SQC8DGLPaSjNzXUqLZ4d.
{"copyright_id":"0x994ca2be46a59db588e113d8b15bca11e011e79944c6d0bd61ea77fbc0c28562","isrc":"TCAFF2026459","name":"Hush, Little Baby","registered_at":"2026-06-28T01:27:06Z","spotify_id":"2o7jiF7Zqcopzme3Rg3Ta6","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994ca2be46a59db588e113d8b15bca11e011e79944c6d0bd61ea77fbc0c28562. 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/2o7jiF7Zqcopzme3Rg3Ta6.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/2o7jiF7Zqcopzme3Rg3Ta6.
{"copyright_id":"0x01abd5a3a86884c56ec20de971e0c88a700bb5cab0dd0f6a10db418bc8739348","isrc":"TCAFF2026409","name":"Frere Jaques (Are You Sleeping)","registered_at":"2026-06-27T04:44:56Z","spotify_id":"6UxHkIzgZcqBeTsvPfsBda","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01abd5a3a86884c56ec20de971e0c88a700bb5cab0dd0f6a10db418bc8739348. 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/6UxHkIzgZcqBeTsvPfsBda.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/6UxHkIzgZcqBeTsvPfsBda.
{"copyright_id":"0xd0f3510eb8592d8b6eabeb0a5fa6e7430934e580c81284c30eb8d79afa118fb6","isrc":"QZDA71838460","name":"A Million Dreams","registered_at":"2026-06-07T23:48:11Z","spotify_id":"5frn1hiVC4Zt5btxkxdy8j","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f3510eb8592d8b6eabeb0a5fa6e7430934e580c81284c30eb8d79afa118fb6. 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/5frn1hiVC4Zt5btxkxdy8j.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/5frn1hiVC4Zt5btxkxdy8j.
{"copyright_id":"0x2c73d6047ad8c4f9a5e4787036afdecbbed9dd3d0edee303159580b9b11118e7","isrc":"QZDA71838461","name":"Never Enough","registered_at":"2026-06-07T17:07:28Z","spotify_id":"2qhbC46PSKum34exHwUOTc","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c73d6047ad8c4f9a5e4787036afdecbbed9dd3d0edee303159580b9b11118e7. 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/2qhbC46PSKum34exHwUOTc.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/2qhbC46PSKum34exHwUOTc.
{"copyright_id":"0xecc2bd048d19b610642ef64224ec6a01769b161da2e5d4f011dcefb6eb1b8fe5","isrc":"QZDA71838462","name":"Come Alive","registered_at":"2026-06-10T14:47:32Z","spotify_id":"2P6MiwtyRI1M5hQ7QxtYCv","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc2bd048d19b610642ef64224ec6a01769b161da2e5d4f011dcefb6eb1b8fe5. 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/2P6MiwtyRI1M5hQ7QxtYCv.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/2P6MiwtyRI1M5hQ7QxtYCv.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef0d74c4f1d9d5e5ecc091dee6be3e78f93edf584d242c8d95739600513c04b. 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/5Q3Ykvgy7DR8Fx7CpUCGVZ.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/5Q3Ykvgy7DR8Fx7CpUCGVZ.
{"copyright_id":"0x4c0c8c7801b95772c5eef35afd235aae1bdb0672163c7f3fdc3b5ddb98f28d9b","isrc":"QZDA71838464","name":"The Other Side","registered_at":"2026-06-09T23:14:59Z","spotify_id":"18L2NTmcTfGliqsLr5qxlr","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0c8c7801b95772c5eef35afd235aae1bdb0672163c7f3fdc3b5ddb98f28d9b. 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/18L2NTmcTfGliqsLr5qxlr.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/18L2NTmcTfGliqsLr5qxlr.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e605ba1fb560e38729609d606c7d2499893136621d921d8005a4ba20054a72. 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/7y0IBAdLSRIt5TdgASz9KR.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/7y0IBAdLSRIt5TdgASz9KR.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85c14288cec49a67168513fedf472fc37a31640da9214ecabe6230831d04462. 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/0ORoH4ER0faMzBRyuZsI2Q.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/0ORoH4ER0faMzBRyuZsI2Q.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d14780bfe31a7d358343019c804f46121ae2b81c04825e1dcefa43b318690a. 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/3hatLOxpcDbmH6NGFq9HGP.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/3hatLOxpcDbmH6NGFq9HGP.
{"copyright_id":"0xb96f5cdd244b1ccc741cca38a9ada5eb7b074c456ac5e5f6e2d80340cb1762e5","isrc":"QZDA71838468","name":"The Greatest Show","registered_at":"2026-06-11T00:45:50Z","spotify_id":"1JMk5oa9E6aZ1vdVuxrUIH","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96f5cdd244b1ccc741cca38a9ada5eb7b074c456ac5e5f6e2d80340cb1762e5. 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/1JMk5oa9E6aZ1vdVuxrUIH.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/1JMk5oa9E6aZ1vdVuxrUIH.
It's the Most Wonderful Time of the Year