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 0x83213078e6e253306dcc83b76b27985ce72ac8b49a3c0a9c0422180b77f98a19. 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/e08dc8ce-a884-4e8c-9ccc-36de56f6c419.json and https://artists.proofprofile.net/proofs/artist/e08dc8ce-a884-4e8c-9ccc-36de56f6c419.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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.
{"copyright_id":"0x899ef5d13d825904de7faacb0cf48fb4047a003e1345f26cff2db842a6ab6353","isrc":"USAT21502619","name":"What'd I Miss","registered_at":"2026-06-01T09:44:10Z","spotify_id":"2W9u3whoCkQYOUbmnSrHi1","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899ef5d13d825904de7faacb0cf48fb4047a003e1345f26cff2db842a6ab6353. 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/2W9u3whoCkQYOUbmnSrHi1.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/2W9u3whoCkQYOUbmnSrHi1.
{"copyright_id":"0x38851e6fe9a40330d6919aaa9a1b24d90cd54c702b6eb6858ea4cbed327f7c27","isrc":"USAT21502597","name":"Aaron Burr, Sir","registered_at":"2026-06-01T06:22:14Z","spotify_id":"6dr7ekfhlbquvsVY8D7gyk","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38851e6fe9a40330d6919aaa9a1b24d90cd54c702b6eb6858ea4cbed327f7c27. 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/6dr7ekfhlbquvsVY8D7gyk.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/6dr7ekfhlbquvsVY8D7gyk.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e076554cae56b95184fb618af32da40b8ac7a9c82d0e9b0c0e484d422e41006. 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/4cxvludVmQxryrnx1m9FqL.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/4cxvludVmQxryrnx1m9FqL.
{"copyright_id":"0xe78aba3b75c6e57afe439f06c32ea3a3752f971e1a947b383e0559f84946ee04","isrc":"USAT21502599","name":"The Story of Tonight","registered_at":"2026-06-01T07:46:15Z","spotify_id":"0NJWhm3hUwIZSy5s0TGJ8q","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78aba3b75c6e57afe439f06c32ea3a3752f971e1a947b383e0559f84946ee04. 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/0NJWhm3hUwIZSy5s0TGJ8q.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/0NJWhm3hUwIZSy5s0TGJ8q.
{"copyright_id":"0x129efe381b18192a33f7fe7e239ee275fb0f65fc8151d2d017255ec8c76d8763","isrc":"USAT21502607","name":"The Story of Tonight - Reprise","registered_at":"2026-06-01T10:34:20Z","spotify_id":"1CzeuSrm71wHP9qsjg7p3F","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129efe381b18192a33f7fe7e239ee275fb0f65fc8151d2d017255ec8c76d8763. 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/1CzeuSrm71wHP9qsjg7p3F.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/1CzeuSrm71wHP9qsjg7p3F.
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":"0xadcdbdfeacf83ae3b463ff268685d057dc04fceb33ad89e0c1a02f82e3fed9e9","isrc":"USAT21502623","name":"The Room Where It Happens","registered_at":"2026-06-01T06:41:11Z","spotify_id":"2TK2KSrzXD6W01qjXVjNGh","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcdbdfeacf83ae3b463ff268685d057dc04fceb33ad89e0c1a02f82e3fed9e9. 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/2TK2KSrzXD6W01qjXVjNGh.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/2TK2KSrzXD6W01qjXVjNGh.
{"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.
{"copyright_id":"0x2f6398a493981f69674b0a1b9c9652d4a41c8c7593bd518fa128c295655deb36","isrc":"USAT21502626","name":"Washington on Your Side","registered_at":"2026-06-01T10:40:07Z","spotify_id":"1WHNqqRWhJVZIdCScFKtl5","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6398a493981f69674b0a1b9c9652d4a41c8c7593bd518fa128c295655deb36. 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/1WHNqqRWhJVZIdCScFKtl5.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/1WHNqqRWhJVZIdCScFKtl5.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b59e8c92267ce1f34ad61a5bb08ce540bc06c1a3bb2f6064296ec2f8015534. 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/1DLfR4MOfLYbV6v3xrmWa8.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/1DLfR4MOfLYbV6v3xrmWa8.
{"copyright_id":"0x64adba2cab4069941f2dbdf5f857abe962c7f8cbb1aac791cce7bebdc13d516c","isrc":"USAT21502637","name":"The Election of 1800","registered_at":"2026-06-01T12:50:14Z","spotify_id":"0LpHC9mhPAQC98IjXZIrif","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64adba2cab4069941f2dbdf5f857abe962c7f8cbb1aac791cce7bebdc13d516c. 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/0LpHC9mhPAQC98IjXZIrif.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/0LpHC9mhPAQC98IjXZIrif.
{"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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e076554cae56b95184fb618af32da40b8ac7a9c82d0e9b0c0e484d422e41006. 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/3HZwynTCP77L6Ctjmv1b4U.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/3HZwynTCP77L6Ctjmv1b4U.
{"copyright_id":"0x1adfa761f68ad37b0345405031ddc5a302ce18f23beec77de0082dd83e72f287","isrc":"USAT21502596","name":"Alexander Hamilton","registered_at":"2026-06-01T05:48:15Z","spotify_id":"2bBt8jybhjpaDISBj3XoM5","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adfa761f68ad37b0345405031ddc5a302ce18f23beec77de0082dd83e72f287. 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/2bBt8jybhjpaDISBj3XoM5.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/2bBt8jybhjpaDISBj3XoM5.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e076554cae56b95184fb618af32da40b8ac7a9c82d0e9b0c0e484d422e41006. 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/62TCa2cmc9D1UqCZNgKFHG.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/62TCa2cmc9D1UqCZNgKFHG.