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 0xee825ca4b4f61aeb65ff6abec65b00b850c1c78c19d7ec1e557fd41a5b83600c. 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/b6c2f048-7eae-44a6-8913-6e2d21d462c5.json and https://artists.proofprofile.net/proofs/artist/b6c2f048-7eae-44a6-8913-6e2d21d462c5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Keyboard Concerto in D minor, BWV974: II. Adagio
{"copyright_id":"0xb8df176d4ffba56d5e56a292d7521f4b797bf142184fd83fb549031463d765ca","isrc":"GBPS84166802","name":"Wonderful World","registered_at":"2026-06-18T10:37:35Z","spotify_id":"6BZXSfJSXqdFOajLQXZVSO","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 0xb8df176d4ffba56d5e56a292d7521f4b797bf142184fd83fb549031463d765ca. 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/6BZXSfJSXqdFOajLQXZVSO.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/6BZXSfJSXqdFOajLQXZVSO.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59ad1e79b06e62c43c03a096d5cf10161712ed458c87835d6011205dc2e135a. 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/3r4jp27IXHkmalYXrWsVhc.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/3r4jp27IXHkmalYXrWsVhc.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a1f4b6f379e2d4492c07d4faf5e0366cd4e0188367720421b578395eda5558. 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/631zcO4GHaJ3GpOlYdM2bY.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/631zcO4GHaJ3GpOlYdM2bY.
{"copyright_id":"0x69e2c64229b364b782398cbf5cfa393914d886dab97bd3f050b465ec8d6b0f33","isrc":"GBLLT2100684","name":"My Bonnie Lies over the Ocean","registered_at":"2026-06-08T09:34:27Z","spotify_id":"6doFzwrTUC9A7a7KIwgluk","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e2c64229b364b782398cbf5cfa393914d886dab97bd3f050b465ec8d6b0f33. 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/6doFzwrTUC9A7a7KIwgluk.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/6doFzwrTUC9A7a7KIwgluk.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6485010331d3c558025384707f6d471d13d675fe10f5f8a0163fa5c8596f29. 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/7fPDvuzWvA5EsEO4xebRRW.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/7fPDvuzWvA5EsEO4xebRRW.
{"copyright_id":"0x9d0154b7fe94b22c65e0dd9a2488b73fa5a22019aafee93c8b18a51bc5782d6a","isrc":"GBLLT2100686","name":"Scarborough Fair","registered_at":"2026-06-09T05:42:30Z","spotify_id":"4revzlEZmSETlTuznoI702","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0154b7fe94b22c65e0dd9a2488b73fa5a22019aafee93c8b18a51bc5782d6a. 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/4revzlEZmSETlTuznoI702.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/4revzlEZmSETlTuznoI702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db12f6c887375f19e685cb581eb4314062710db2d6cda85cfa10412e19201ae. 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/3O2QH0lCOZFh4moln9mO5I.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/3O2QH0lCOZFh4moln9mO5I.
{"copyright_id":"0x29e4eb30408be03df0aa6e03c46d1f41d4e6bf91af5bb8801e206395c3616d5b","isrc":"GBLLT2100688","name":"Frère Jacques","registered_at":"2026-06-08T17:20:50Z","spotify_id":"5sqbhcA0bYKFLsIRjt4S6g","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e4eb30408be03df0aa6e03c46d1f41d4e6bf91af5bb8801e206395c3616d5b. 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/5sqbhcA0bYKFLsIRjt4S6g.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/5sqbhcA0bYKFLsIRjt4S6g.
Twinkle Twinkle Little Star - Remastered
{"copyright_id":"0x8c74bdbfb78090b7e04b793f2a691daff24fdc0de13596a022afdbfecdfb8408","isrc":"GBLLT2100689","name":"Twinkle Twinkle Little Star - Remastered","registered_at":"2026-06-04T13:34:51Z","spotify_id":"0dPmLPbXqeKX43iB46DY4b","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c74bdbfb78090b7e04b793f2a691daff24fdc0de13596a022afdbfecdfb8408. 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/0dPmLPbXqeKX43iB46DY4b.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/0dPmLPbXqeKX43iB46DY4b.
{"copyright_id":"0xcd48535230e5f4c2207c9cd8a4975d56795ca0f00f871e83fab55c3c78fdbffd","isrc":"GBLLT2100690","name":"Mozart's Theme from Sonata in A","registered_at":"2026-06-07T05:29:57Z","spotify_id":"02GrD3nDlz9ZQCoTkox7GO","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd48535230e5f4c2207c9cd8a4975d56795ca0f00f871e83fab55c3c78fdbffd. 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/02GrD3nDlz9ZQCoTkox7GO.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/02GrD3nDlz9ZQCoTkox7GO.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9564d8089268427e1c13d37064f2a45881fc9a29824effabe3700c2a1e92fa. 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/4O6OMCucAL8zvKBqk9pWRh.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/4O6OMCucAL8zvKBqk9pWRh.
{"copyright_id":"0x9bc0e11bbc1100e93be0b7f3d46975d37b5b88530cd9f76e3ea9fc6c747f287f","isrc":"GBLLT2100692","name":"Satie's Gymnopédie, No.1","registered_at":"2026-06-10T00:14:52Z","spotify_id":"0BPUwxiTpq5ZCGFFNwfjVe","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc0e11bbc1100e93be0b7f3d46975d37b5b88530cd9f76e3ea9fc6c747f287f. 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/0BPUwxiTpq5ZCGFFNwfjVe.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/0BPUwxiTpq5ZCGFFNwfjVe.
{"copyright_id":"0xbd97f769d3f61faac07470bf081ee0d3dbf1501af2c731d6628ce32ede05a99c","isrc":"GBLLT2100693","name":"Shhh with Waves","registered_at":"2026-06-10T13:41:23Z","spotify_id":"1IHDqrcLPI3YhDbGYQEfOL","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd97f769d3f61faac07470bf081ee0d3dbf1501af2c731d6628ce32ede05a99c. 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/1IHDqrcLPI3YhDbGYQEfOL.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/1IHDqrcLPI3YhDbGYQEfOL.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d701abcdc21555761f23993fd1d6fc11b2ca1c7ec023530a1161f685e6573f9. 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/09NcmUeARveY7ItHsWPJAR.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/09NcmUeARveY7ItHsWPJAR.
{"copyright_id":"0x9ef6d4b16a7bb7cbaf611ef4bfc00d7ab53ba110d995454e41bcba143b4745c5","isrc":"GBLLT2351449","name":"Little Donkey","registered_at":"2026-06-20T18:09:37Z","spotify_id":"2IHrhD5gJfQnUa5UseRGZ9","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef6d4b16a7bb7cbaf611ef4bfc00d7ab53ba110d995454e41bcba143b4745c5. 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/2IHrhD5gJfQnUa5UseRGZ9.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/2IHrhD5gJfQnUa5UseRGZ9.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59ad1e79b06e62c43c03a096d5cf10161712ed458c87835d6011205dc2e135a. 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/7FPlSZe2IqdbQAEX23CF01.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/7FPlSZe2IqdbQAEX23CF01.
{"copyright_id":"0x6e8b587446f3a234d5383937d690d5ccc71f4c481dd548a524d06d3bd16c817d","isrc":"GBLLT2100905","name":"Shhh to Sleep with Heartbeat","registered_at":"2026-06-07T11:28:28Z","spotify_id":"5G9vrQWeOQAAZW6aVnyrEw","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8b587446f3a234d5383937d690d5ccc71f4c481dd548a524d06d3bd16c817d. 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/5G9vrQWeOQAAZW6aVnyrEw.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/5G9vrQWeOQAAZW6aVnyrEw.
{"copyright_id":"0x9eb759c9092d6487ee183764a610c3849cdd12c59fdbf3465c6f245047069e30","isrc":"GBLLT2035353","name":"Twinkle Twinkle Little Star","registered_at":"2026-06-25T15:12:33Z","spotify_id":"5lD7EuVWlpeB0QzksqgilC","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb759c9092d6487ee183764a610c3849cdd12c59fdbf3465c6f245047069e30. 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/5lD7EuVWlpeB0QzksqgilC.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/5lD7EuVWlpeB0QzksqgilC.