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 0x10681d32921402b100e6844b6d2e38cc3f7af4c21efdc99742cf9657ac27193e. 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/85e3ac77-d626-4b40-8ca9-b745185d53a6.json and https://artists.proofprofile.net/proofs/artist/85e3ac77-d626-4b40-8ca9-b745185d53a6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Requiem in D Minor, K. 626: Sequence: VI. Lacrimosa dies illa
Requiem in D Minor, K. 626: Sequence: I. Dies irae
{"copyright_id":"0x1fc22cba164cda6c66760260d6e319f8958e4fce67ddab30fa6f7bed7c9cc7cd","isrc":"HKI199278112","name":"Requiem in D Minor, K. 626: Benedictus","registered_at":"2026-06-07T14:16:22Z","spotify_id":"1SPpQyN6M9WapzFheOLQxV","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 0x1fc22cba164cda6c66760260d6e319f8958e4fce67ddab30fa6f7bed7c9cc7cd. 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/1SPpQyN6M9WapzFheOLQxV.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/1SPpQyN6M9WapzFheOLQxV.
Requiem in D Minor, K. 626: Kyrie eleison
Requiem In D Minor, K. 626: Introit: Requiem Aeternam
{"copyright_id":"0x4f143e5c2c16c548859767567fffda1d608365fb1228761f40e4e7e32375ed4b","isrc":"HKI199278101","name":"Requiem In D Minor, K. 626: Introit: Requiem Aeternam","registered_at":"2026-06-05T09:02:57Z","spotify_id":"6e7lvDgvrNCmXmGAVXGKhG","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f143e5c2c16c548859767567fffda1d608365fb1228761f40e4e7e32375ed4b. 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/6e7lvDgvrNCmXmGAVXGKhG.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/6e7lvDgvrNCmXmGAVXGKhG.
Requiem In D Minor, K. 626: Kyrie Eleison
{"copyright_id":"0xb3cf7a55b765e192e9288f8da4f4b8f4745a6e6f74698080f3183dcc3751ebc6","isrc":"HKI199278102","name":"Requiem In D Minor, K. 626: Kyrie Eleison","registered_at":"2026-06-05T22:34:13Z","spotify_id":"6w9eBsnjGEYLqzsR3LJt42","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cf7a55b765e192e9288f8da4f4b8f4745a6e6f74698080f3183dcc3751ebc6. 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/6w9eBsnjGEYLqzsR3LJt42.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/6w9eBsnjGEYLqzsR3LJt42.
Requiem In D Minor, K. 626: Sequence: I. Dies Irae
{"copyright_id":"0xd38c9655f9911f653b719444401f47b6306c44385d1f9a8bab96fcb890fa6915","isrc":"HKI199278103","name":"Requiem In D Minor, K. 626: Sequence: I. Dies Irae","registered_at":"2026-06-07T14:21:04Z","spotify_id":"2RVry0sPmDSZxnna3HAw7g","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38c9655f9911f653b719444401f47b6306c44385d1f9a8bab96fcb890fa6915. 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/2RVry0sPmDSZxnna3HAw7g.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/2RVry0sPmDSZxnna3HAw7g.
Requiem In D Minor, K. 626: Sequence: II. Tuba Mirum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc136943adf2b40e9697141364522ffe932be113488b198f9528db5123c796605. 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/01F7A57L6KCok5rh818x2K.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/01F7A57L6KCok5rh818x2K.
Requiem In D Minor, K. 626: Sequence: III. Rex Tremendae Majestatis
{"copyright_id":"0x8c6f5d76882186b07bc80181ee8c5cda26bdcd820ae992ee88702c6cbc54277a","isrc":"HKI199278105","name":"Requiem In D Minor, K. 626: Sequence: III. Rex Tremendae Majestatis","registered_at":"2026-06-05T13:14:23Z","spotify_id":"4qD0EceQ3BVrNFzlMf4cTj","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6f5d76882186b07bc80181ee8c5cda26bdcd820ae992ee88702c6cbc54277a. 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/4qD0EceQ3BVrNFzlMf4cTj.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/4qD0EceQ3BVrNFzlMf4cTj.
Requiem In D Minor, K. 626: Sequence: IV. Recordare, Jesu Pie
{"copyright_id":"0x803b16ed87aca116afbfeb2cf7d483656bce1a5abc3d2f33909214f739e5e802","isrc":"HKI199278106","name":"Requiem In D Minor, K. 626: Sequence: IV. Recordare, Jesu Pie","registered_at":"2026-06-06T01:41:33Z","spotify_id":"65qjTV4cGdq3rbaSFgDaZR","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803b16ed87aca116afbfeb2cf7d483656bce1a5abc3d2f33909214f739e5e802. 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/65qjTV4cGdq3rbaSFgDaZR.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/65qjTV4cGdq3rbaSFgDaZR.
Requiem In D Minor, K. 626: Sequence: V. Confutatis Maledictis
{"copyright_id":"0x99dc386f66731ef810bb9eb357a7fcb4e5507deea27df24dd624de484a08075f","isrc":"HKI199278107","name":"Requiem In D Minor, K. 626: Sequence: V. Confutatis Maledictis","registered_at":"2026-06-05T17:19:14Z","spotify_id":"4yOTeF1PPNxTUC6BEoP7UU","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99dc386f66731ef810bb9eb357a7fcb4e5507deea27df24dd624de484a08075f. 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/4yOTeF1PPNxTUC6BEoP7UU.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/4yOTeF1PPNxTUC6BEoP7UU.
Requiem In D Minor, K. 626: Sequence: VI. Lacrimosa Dies Illa
{"copyright_id":"0x9e5602646eb4e2ce652aa09a11c513292aa7e9c10aa2f1742dd0c6e6e8224209","isrc":"HKI199278108","name":"Requiem In D Minor, K. 626: Sequence: VI. Lacrimosa Dies Illa","registered_at":"2026-06-02T01:42:33Z","spotify_id":"08B8Ki7qlUoT58Zd1trxkl","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5602646eb4e2ce652aa09a11c513292aa7e9c10aa2f1742dd0c6e6e8224209. 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/08B8Ki7qlUoT58Zd1trxkl.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/08B8Ki7qlUoT58Zd1trxkl.
Requiem In D Minor, K. 626: Offertory: I. Domine Jesu Christe
{"copyright_id":"0x143dd35a93fc66d7fdb3c2b2b3e27e5e0f9ad79b9753ffa7d5dcbc243068e128","isrc":"HKI199278109","name":"Requiem In D Minor, K. 626: Offertory: I. Domine Jesu Christe","registered_at":"2026-06-05T17:17:17Z","spotify_id":"3kKETcMRFP76UvK83pW6X9","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143dd35a93fc66d7fdb3c2b2b3e27e5e0f9ad79b9753ffa7d5dcbc243068e128. 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/3kKETcMRFP76UvK83pW6X9.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/3kKETcMRFP76UvK83pW6X9.
Requiem In D Minor, K. 626: Offertory: II. Hostias Et Preces
{"copyright_id":"0xc24aa7b910fa91e47c6b0c4208b29ea4b1c7dceba458a76159d89572e257a64b","isrc":"HKI199278110","name":"Requiem In D Minor, K. 626: Offertory: II. Hostias Et Preces","registered_at":"2026-06-06T06:04:42Z","spotify_id":"08ckBqGpc3lepDgVJiHShh","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24aa7b910fa91e47c6b0c4208b29ea4b1c7dceba458a76159d89572e257a64b. 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/08ckBqGpc3lepDgVJiHShh.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/08ckBqGpc3lepDgVJiHShh.
{"copyright_id":"0xcb5047bf98ccce74759a9ac3a29380f8d9a726f15438f70940bd5bec940ea553","isrc":"HKI199278111","name":"Requiem In D Minor, K. 626: Sanctus","registered_at":"2026-06-05T06:41:28Z","spotify_id":"5OjWZJWyPwC2PREwrVflfc","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5047bf98ccce74759a9ac3a29380f8d9a726f15438f70940bd5bec940ea553. 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/5OjWZJWyPwC2PREwrVflfc.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/5OjWZJWyPwC2PREwrVflfc.
{"copyright_id":"0x1fc22cba164cda6c66760260d6e319f8958e4fce67ddab30fa6f7bed7c9cc7cd","isrc":"HKI199278112","name":"Requiem In D Minor, K. 626: Benedictus","registered_at":"2026-06-07T14:16:22Z","spotify_id":"6KqE04TC5W08HlCHFmcUpr","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc22cba164cda6c66760260d6e319f8958e4fce67ddab30fa6f7bed7c9cc7cd. 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/6KqE04TC5W08HlCHFmcUpr.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/6KqE04TC5W08HlCHFmcUpr.
{"copyright_id":"0x5110b06f89c1abb8ef8100be5996d85783f1567d8e4c95c23ecd4103b25d4e2a","isrc":"HKI199278113","name":"Requiem In D Minor, K. 626: Agnus Dei","registered_at":"2026-06-06T11:25:27Z","spotify_id":"2nWY8LAqAJUh2nnrhxsAQD","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5110b06f89c1abb8ef8100be5996d85783f1567d8e4c95c23ecd4103b25d4e2a. 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/2nWY8LAqAJUh2nnrhxsAQD.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/2nWY8LAqAJUh2nnrhxsAQD.
Requiem In D Minor, K. 626: Communion: Lux Aeterna
{"copyright_id":"0xb9d16badce4dac73eccdf5a2f0d97fd59f2fa85e8dce57fd9d45b8247bc5fd90","isrc":"HKI199278114","name":"Requiem In D Minor, K. 626: Communion: Lux Aeterna","registered_at":"2026-06-07T08:06:10Z","spotify_id":"7DIrMFnfrUhk8Xn9vrXnKA","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d16badce4dac73eccdf5a2f0d97fd59f2fa85e8dce57fd9d45b8247bc5fd90. 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/7DIrMFnfrUhk8Xn9vrXnKA.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/7DIrMFnfrUhk8Xn9vrXnKA.