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 0xd4857f6ea7e9d2669c980cae50eee0ae3b401a265998d6f6ae70b9188f78be45. 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/1b5eb92f-d762-4976-af34-7adba2b2899d.json and https://artists.proofprofile.net/proofs/artist/1b5eb92f-d762-4976-af34-7adba2b2899d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Roger Federer: Portrait of an Artist [A study and biography of one of tennis' greatest players (Unabbreviated)]
Chapter 1 - Roger Federer: Portrait of an Artist - A study and biography of one of tennis' greatest players
Chapter 10 - Roger Federer: Portrait of an Artist - A study and biography of one of tennis' greatest players
Chapter 2 - Roger Federer: Portrait of an Artist - A study and biography of one of tennis' greatest players
Chapter 11 - Roger Federer: Portrait of an Artist - A study and biography of one of tennis' greatest players
Chapter 12 - Roger Federer: Portrait of an Artist - A study and biography of one of tennis' greatest players
Chapter 3 - Roger Federer: Portrait of an Artist - A study and biography of one of tennis' greatest players
Chapter 13 - Roger Federer: Portrait of an Artist - A study and biography of one of tennis' greatest players
Chapter 4 - Roger Federer: Portrait of an Artist - A study and biography of one of tennis' greatest players
Chapter 5 - Roger Federer: Portrait of an Artist - A study and biography of one of tennis' greatest players
Chapter 14 - Roger Federer: Portrait of an Artist - A study and biography of one of tennis' greatest players
Chapter 6 - Roger Federer: Portrait of an Artist - A study and biography of one of tennis' greatest players
Chapter 15 - Roger Federer: Portrait of an Artist - A study and biography of one of tennis' greatest players
Chapter 16 - Roger Federer: Portrait of an Artist - A study and biography of one of tennis' greatest players
Chapter 7 - Roger Federer: Portrait of an Artist - A study and biography of one of tennis' greatest players
Chapter 17 - Roger Federer: Portrait of an Artist - A study and biography of one of tennis' greatest players
Chapter 8 - Roger Federer: Portrait of an Artist - A study and biography of one of tennis' greatest players
Chapter 9 - Roger Federer: Portrait of an Artist - A study and biography of one of tennis' greatest players
Hamilton (Original Broadway Cast Recording)
{"copyright_id":"0x1adfa761f68ad37b0345405031ddc5a302ce18f23beec77de0082dd83e72f287","isrc":"USAT21502596","name":"Alexander Hamilton","registered_at":"2026-06-01T05:48:17Z","spotify_id":"4TTV7EcfroSLWzXRY6gLv6","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 0x1adfa761f68ad37b0345405031ddc5a302ce18f23beec77de0082dd83e72f287. 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/4TTV7EcfroSLWzXRY6gLv6.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/4TTV7EcfroSLWzXRY6gLv6.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120f9c2cce2607ebd3a22254b588656594ee9ad4d4488cde47aa234a38e6fe4f. 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/7m9XR7FquXLP1FewdAcNS9.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/7m9XR7FquXLP1FewdAcNS9.
Where You Are - From "Moana"/Soundtrack Version
{"copyright_id":"0xde85aafe1e6c5bf321b05d27190806832f0a624b2dca4390ca28ebb7af806ce4","isrc":"USWD11677854","name":"Where You Are - From \"Moana\"/Soundtrack Version","registered_at":"2026-06-04T08:33:11Z","spotify_id":"3dqvOY7rpOaVmINACruTNc","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde85aafe1e6c5bf321b05d27190806832f0a624b2dca4390ca28ebb7af806ce4. 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/3dqvOY7rpOaVmINACruTNc.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/3dqvOY7rpOaVmINACruTNc.
Vivo (Original Motion Picture Soundtrack)
{"copyright_id":"0x8ddeae43448e4302b315ec3f3d8a10b79bb26e398f5ad7eeec65aff59f365aa2","isrc":"USAT22103694","name":"Running Out Of Time","registered_at":"2026-06-04T08:17:08Z","spotify_id":"6ZYv8ozQzQr1ClAe8dnUZN","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddeae43448e4302b315ec3f3d8a10b79bb26e398f5ad7eeec65aff59f365aa2. 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/6ZYv8ozQzQr1ClAe8dnUZN.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/6ZYv8ozQzQr1ClAe8dnUZN.
{"copyright_id":"0xa422b290e16b3d5d3da122a01fd4de41bdfb5752e8b46afcc38a216849e6fe35","isrc":"USAT21502611","name":"Meet Me Inside","registered_at":"2026-06-01T11:20:55Z","spotify_id":"6p7jXaTJdpzGWnOJoK2jYr","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa422b290e16b3d5d3da122a01fd4de41bdfb5752e8b46afcc38a216849e6fe35. 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/6p7jXaTJdpzGWnOJoK2jYr.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/6p7jXaTJdpzGWnOJoK2jYr.
{"copyright_id":"0x4a3009e2bf5bc419abcb7c6d98dfa90a1b240d534bb6bb18c7d49ab65c8aa42b","isrc":"USAT21502614","name":"History Has Its Eyes on You","registered_at":"2026-06-01T09:33:35Z","spotify_id":"1mGO8rwCE9zk7H06OxcU5m","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3009e2bf5bc419abcb7c6d98dfa90a1b240d534bb6bb18c7d49ab65c8aa42b. 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/1mGO8rwCE9zk7H06OxcU5m.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/1mGO8rwCE9zk7H06OxcU5m.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1535b3171f407cd6573b71eb4dbb4d3c97073f947f24932e9318f6ec6b389c3. 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/7qfoq1JFKBUEIvhqOHzuqX.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/7qfoq1JFKBUEIvhqOHzuqX.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41bfaca4763169546bc88d23035b47d74b37f76e03426590fa11f2f02f2bdb7. 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/3TfKt8mPpdXfQTMfRjHzyz.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/3TfKt8mPpdXfQTMfRjHzyz.
{"copyright_id":"0x6eeeef00564bac3a6339bdeefe99568b6da52f83bdd87ca72f6652718156cd78","isrc":"USAT21502625","name":"Cabinet Battle #2","registered_at":"2026-06-01T13:57:12Z","spotify_id":"6KRHMYPIWRgFWlXPgqO2Fp","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eeeef00564bac3a6339bdeefe99568b6da52f83bdd87ca72f6652718156cd78. 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/6KRHMYPIWRgFWlXPgqO2Fp.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/6KRHMYPIWRgFWlXPgqO2Fp.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78769082e41ca6760d17e2c7d485844fdeb2be94adadb7e6c6629e2e0bbad1a8. 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/0Iys022UwQ8xBfxE1g4nWZ.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/0Iys022UwQ8xBfxE1g4nWZ.
In the Heights (Original Broadway Cast Recording)
{"copyright_id":"0x1569db2e9a24f6ddbee5dc873716c8b22a0b910c60c969519edd8d1ec3818209","isrc":"USSK30896002","name":"Benny's Dispatch","registered_at":"2026-06-04T13:02:14Z","spotify_id":"41mYUxw1L4DCHSgpWHcmAy","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1569db2e9a24f6ddbee5dc873716c8b22a0b910c60c969519edd8d1ec3818209. 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/41mYUxw1L4DCHSgpWHcmAy.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/41mYUxw1L4DCHSgpWHcmAy.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8abfc8e79ea6bc1639abc9b51e8d979dc64cccf66203a4653dcbe774468b76. 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/0mqcxeYg1b57YjniPNTtQ6.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/0mqcxeYg1b57YjniPNTtQ6.
'In The Heights' Original Broadway Company
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59251e891b5e4d2f24d564d97a0a9ab71c70ecf29b402cfb05904b6624d592b. 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/6eR8u06oZFhoBMaKl0xBZp.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/6eR8u06oZFhoBMaKl0xBZp.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6920d305f6973858b8e81cf63b0a0966876f4f90bbd349db258cece5de613098. 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/7ETCUCheWrp9y0k3zaoCNq.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/7ETCUCheWrp9y0k3zaoCNq.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574fd9cb081ece9c7bd58e3a18726f0219ab5f57d8d70f448406586219081ce7. 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/4o1ZZ9TrcwCvqp7wIO0n7l.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/4o1ZZ9TrcwCvqp7wIO0n7l.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00043c82891a73d73ff7d8c4fb75e4510dad95b992ccca2b8c3371e700133fe5. 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/6nMDb1V8J9mKt8pMgOpWe2.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/6nMDb1V8J9mKt8pMgOpWe2.
{"copyright_id":"0xbf691ea924d1a3e2b299220085739056d1057e082bd2c38b13676da87bffe50c","isrc":"USSK30896026","name":"When You're Home - Radio Edit","registered_at":"2026-06-07T19:12:38Z","spotify_id":"1ByTNOl4eAizhAS2gmXVH6","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf691ea924d1a3e2b299220085739056d1057e082bd2c38b13676da87bffe50c. 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/1ByTNOl4eAizhAS2gmXVH6.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/1ByTNOl4eAizhAS2gmXVH6.
Vaiana (English Version/Original Motion Picture Soundtrack/Deluxe Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248d65d49d05cd6a5a32757cef8d16479296f93bc8f8c33db46111f1453b7341. 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/0KBgLJ9hRd40jq1DeuYmNM.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/0KBgLJ9hRd40jq1DeuYmNM.
{"copyright_id":"0x1adfa761f68ad37b0345405031ddc5a302ce18f23beec77de0082dd83e72f287","isrc":"USAT21502596","name":"Alexander Hamilton","registered_at":"2026-06-01T05:48:17Z","spotify_id":"4TPauzfA2b6R5UsiMShUGt","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adfa761f68ad37b0345405031ddc5a302ce18f23beec77de0082dd83e72f287. 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/4TPauzfA2b6R5UsiMShUGt.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/4TPauzfA2b6R5UsiMShUGt.